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#include <iostream> #include<algorithm> #include<vector> #include<string> using namespace std; int main() { int t; cin>>t; while(t--) { int n, m, q=0; bool b=0; cin>>n>>m; vector<vector<char>>a(n, vector<char>(m)); for(int i=0; i<n; i++) { for(int j=0; j<m; j++) { cin>>a[i][j]; } } for(int i=0; i<m; i++) { for(int j=0; j<n; j++) { if(a[i][j]=='v') { q++; } if((a[i][j]=='i')&&(q==1)) { q++; } if((a[i][j]=='k')&&(q==2)) { q++; } if((a[i][j]=='a')&&(q==3)) { b=1; } } } if(b) { cout<<"YES"<<endl; } else { cout<<"NO"<<endl; } } return 0; }