/* in the name of Anton */
 
/*
  Compete against Yourself.
  Author - Aryan (@aryanc403)
  Atcoder library - https://atcoder.github.io/ac-library/production/document_en/
*/
 
#ifdef ARYANC403
    #include <header.h>
#else
    #pragma GCC optimize ("Ofast")
    #pragma GCC target ("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx")
    //#pragma GCC optimize ("-ffloat-store")
    #include<bits/stdc++.h>
    #define dbg(args...) 42;
#endif
 
// y_combinator from @neal template https://codeforces.com/contest/1553/submission/123849801
// http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2016/p0200r0.html
template<class Fun> class y_combinator_result {
    Fun fun_;
public:
    template<class T> explicit y_combinator_result(T &&fun): fun_(std::forward<T>(fun)) {}
    template<class ...Args> decltype(auto) operator()(Args &&...args) { return fun_(std::ref(*this), std::forward<Args>(args)...); }
};
template<class Fun> decltype(auto) y_combinator(Fun &&fun) { return y_combinator_result<std::decay_t<Fun>>(std::forward<Fun>(fun)); }
 
using namespace std;
#define fo(i,n)   for(i=0;i<(n);++i)
#define repA(i,j,n)   for(i=(j);i<=(n);++i)
#define repD(i,j,n)   for(i=(j);i>=(n);--i)
#define all(x) begin(x), end(x)
#define sz(x) ((lli)(x).size())
#define pb push_back
#define mp make_pair
#define X first
#define Y second
#define endl "\n"
 
typedef long long int lli;
typedef long double mytype;
typedef pair<lli,lli> ii;
typedef vector<ii> vii;
typedef vector<lli> vi;
 
const auto start_time = std::chrono::high_resolution_clock::now();
void aryanc403()
{
#ifdef ARYANC403
auto end_time = std::chrono::high_resolution_clock::now();
std::chrono::duration<double> diff = end_time-start_time;
    cerr<<"Time Taken : "<<diff.count()<<"\n";
#endif
}
 
long long readInt(long long l, long long r, char endd) {
    long long x=0;
    int cnt=0;
    int fi=-1;
    bool is_neg=false;
    while(true) {
        char g=getchar();
        if(g=='-') {
            assert(fi==-1);
            is_neg=true;
            continue;
        }
        if('0'<=g&&g<='9') {
            x*=10;
            x+=g-'0';
            if(cnt==0) {
                fi=g-'0';
            }
            cnt++;
            assert(fi!=0 || cnt==1);
            assert(fi!=0 || is_neg==false);
 
            assert(!(cnt>19 || ( cnt==19 && fi>1) ));
        } else if(g==endd) {
            if(is_neg) {
                x=-x;
            }
            assert(l<=x&&x<=r);
            return x;
        } else {
            assert(false);
        }
    }
}
string readString(int l, int r, char endd) {
    string ret="";
    int cnt=0;
    while(true) {
        char g=getchar();
        assert(g!=-1);
        if(g==endd) {
            break;
        }
        cnt++;
        ret+=g;
    }
    assert(l<=cnt&&cnt<=r);
    return ret;
}
long long readIntSp(long long l, long long r) {
    return readInt(l,r,' ');
}
long long readIntLn(long long l, long long r) {
    return readInt(l,r,'\n');
}
string readStringLn(int l, int r) {
    return readString(l,r,'\n');
}
string readStringSp(int l, int r) {
    return readString(l,r,' ');
}
 
void readEOF(){
    assert(getchar()==EOF);
}
 
vi readVectorInt(int n,lli l,lli r){
    vi a(n);
    for(int i=0;i<n-1;++i)
        a[i]=readIntSp(l,r);
    a[n-1]=readIntLn(l,r);
    return a;
}
 
bool isBinaryString(const string s){
    for(auto x:s){
        if('0'<=x&&x<='1')
            continue;
        return false;
    }
    return true;
}
 
// #include<atcoder/dsu>
// vector<vi> readTree(const int n){
//     vector<vi> e(n);
//     atcoder::dsu d(n);
//     for(lli i=1;i<n;++i){
//         const lli u=readIntSp(1,n)-1;
//         const lli v=readIntLn(1,n)-1;
//         e[u].pb(v);
//         e[v].pb(u);
//         d.merge(u,v);
//     }
//     assert(d.size(0)==n);
//     return e;
// }
 
const lli INF = 0xFFFFFFFFFFFFFFFL;
 
lli seed;
mt19937 rng(seed=chrono::steady_clock::now().time_since_epoch().count());
inline lli rnd(lli l=0,lli r=INF)
{return uniform_int_distribution<lli>(l,r)(rng);}
 
class CMP
{public:
bool operator()(ii a , ii b) //For min priority_queue .
{    return ! ( a.X < b.X || ( a.X==b.X && a.Y <= b.Y ));   }};
 
void add( map<lli,lli> &m, lli x,lli cnt=1)
{
    auto jt=m.find(x);
    if(jt==m.end())         m.insert({x,cnt});
    else                    jt->Y+=cnt;
}
 
void del( map<lli,lli> &m, lli x,lli cnt=1)
{
    auto jt=m.find(x);
    if(jt->Y<=cnt)            m.erase(jt);
    else                      jt->Y-=cnt;
}
 
bool cmp(const ii &a,const ii &b)
{
    return a.X<b.X||(a.X==b.X&&a.Y<b.Y);
}
 
const lli mod = 1000000007L;
// const lli maxN = 1000000007L;
 
    lli T,n,i,j,k,in,cnt,l,r,u,v,x,y;
    lli m;
    string s;
    vi a;
    //priority_queue < ii , vector < ii > , CMP > pq;// min priority_queue .
 
int main(void) {
    ios_base::sync_with_stdio(false);cin.tie(NULL);
    // freopen("txt.in", "r", stdin);
    // freopen("txt.out", "w", stdout);
// cout<<std::fixed<<std::setprecision(35);
T=readIntLn(1,1e3);
lli sumNM = 4e5;
const vii dir={{0,1},{1,0}};
while(T--)
{
    const lli n = readIntSp(2,1e5);
    const lli m = readIntSp(2,1e5);
    sumNM-=n*m;
    assert(sumNM>=0);
    const lli k = readIntLn(1,1e9);
    vector<string> a(n);
    for(auto &s:a){
        s=readStringLn(m,m);
        assert(isBinaryString(s));
    }
 
    auto runBulk=[&](lli k)->void{
        if(k==0)
            return;
        vector<vi> b(n,vi(m));
        b[0][0]=k;
        for(lli sum=0;sum<n+m;++sum){
            for(lli i=max(0LL,sum-m);i<n&&i<=sum;++i){
                const lli j=sum-i;
                if(j<0||j>=m||b[i][j]==0)
                    continue;
                if(i==n-1||j==m-1){
                    if(i==n-1&&j==m-1)
                        continue;
                    if(i==n-1){
                        if(a[i][j]=='0'){
                            b[i][j+1]++;
                            a[i][j]^=1;
                        }
                        continue;
                    }
 
                    if(j==m-1){
                        if(a[i][j]=='1'){
                            b[i+1][j]++;
                            a[i][j]^=1;
                        }
                        continue;
                    }
                    assert(false);
                }
                const lli c=b[i][j];
                b[i+1][j]+=c/2;
                b[i][j+1]+=c/2;
                if(c%2==0)
                    continue;
                const auto d=dir[a[i][j]-'0'];
                a[i][j]^=1;
                b[i+d.X][j+d.Y]++;
            }
        }
    };
 
    auto runOnce=[&]()->ii{
        dbg(a);
        lli i=0,j=0;
        while(i<n&&j<m){
            const auto d=dir[a[i][j]-'0'];
            if(i+d.X>=n||j+d.Y>=m)
                return {i,j};
            a[i][j]^=1;
            i+=d.X;
            j+=d.Y;
        }
        assert(false);
    };
 
    runBulk(k-1);
    ii ans=runOnce();
    cout<<ans.X+1<<" "<<ans.Y+1<<endl;
 
}   aryanc403();
    readEOF();
    return 0;
}