#include<bits/stdc++.h>
using namespace std;

char s[100009];
//int cell[10009];

int main(){

    int t; scanf("%d", &t);

    for(int cs = 1; cs <= t; cs++){
        int a,b;
        scanf("%s %d%d",s,&a,&b);
        int x = 0, y = 0;
        int n = strlen(s);
        for(int i = 1; i <= n; i++){
            if(s[i - 1] == 'A')x = i;
            else if(s[i - 1] == 'B') y = i;
        }

        bool safe = true;
        while(safe){
            if(x == y)safe = false;
            if(x > y)break;
            x += a;
            y -= b;
        }

        if(safe)puts("safe");
        else puts("unsafe");
    }
    return 0;
}