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#include <iostream> | |
#include <cstring> | |
#include <stack> | |
#include <vector> | |
#include <algorithm> | |
using namespace std; | |
char str[]="ALLIZZWELL"; | |
int v[105][105]; | |
int n,m; | |
vector<string> inp; | |
int fn(int r, int c, int l) | |
{ | |
//cout << r << ' ' << c << ' ' << l << endl; | |
if(l==10) | |
return true; | |
v[r][c]=1; | |
for(int i=-1;i<=1;i++) | |
for(int j=-1;j<=1;j++) | |
{ | |
int r1=r+i, c1=c+j; | |
if((i==0&&j==0)||r1<0||r1>=n||c1<0||c1>=m||inp[r1][c1]!=str[l]) | |
continue; | |
if(v[r1][c1]) | |
continue; | |
if( fn(r1,c1,l+1) ){ | |
v[r][c]=0; | |
return true; | |
} | |
} | |
v[r][c]=0; | |
return false; | |
} | |
int main() | |
{ | |
int tc; | |
cin >> tc; | |
while(tc--){ | |
inp.clear(); | |
stack<class _x> st; | |
cin>>n>>m; | |
for(int i=0;i<n;i++ ){ | |
string a; | |
cin>>a; | |
inp.push_back(a); | |
} | |
bool f=false; | |
for(int i=0;i<n;i++) | |
for(int j=0;j<m;j++) | |
if(inp[i][j]=='A' && fn(i,j,1)){ | |
f=true; break; | |
} | |
if(f) | |
cout<<"YES"<<endl; | |
else | |
cout<<"NO"<<endl; | |
} | |
} |
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