#include<bits/stdc++.h>
#define ll long long
#define eb emplace_back
#define ep emplace
#define pii pair<int,int>
#define fi first
#define se second
#define debug(...) fprintf(stderr,__VA_ARGS__)
#define mems(arr,x) memset(arr,x,sizeof(arr))
#define memc(arr1,arr2) memcpy(arr1,arr2,sizeof(arr2))
using namespace std;
const int maxn=210;
int n,m,k;
string s[maxn];
vector<pair<string,pii>> v;
int main(){
    cin>>n>>m>>k;
    for(int i=1;i<=n;i++)   cin>>s[i];
    for(int i=1;i<=n;i++)
        for(int j=0,l=1;l<=m;j+=k,l++)
            v.eb(s[i].substr(j,k),pii(i,l));
    sort(v.begin(),v.end());
    if(v[1].fi==v[0].fi)    printf("%d %d\n",v.back().se.fi,v.back().se.se);
    else    printf("%d %d\n",v[0].se.fi,v[0].se.se);
}