2017/MAR/COOK80/ROBOTG/ROBOTG.cpp
// Code written by Monal
#include"bits/stdc++.h"
#include<stdio.h>
using namespace std;
int main() {
int tc;
scanf("%d",&tc);
while(tc--) {
int n,m;
string s;
scanf("%d%d",&n,&m);
cin>>s;
for(int i=0;i<n;i++) {
for(int j=0;j<m;j++) {
int ci=i,cj=j,k;
for(k=0;k<s.length();k++) {
if(s[k]=='L'){
cj--;
if(cj<0)
break;
}
else if(s[k]=='R'){
cj++;
if(cj>=m)
break;
}
else if(s[k]=='D'){
ci++;
if(ci>=n)
break;
}
else{
ci--;
if(ci<0)
break;
}
}
if(k==s.length())
{
printf("safe\n");
goto skip;
}
}
}
printf("unsafe\n");
skip:
int a;
}
return 0;
}