#include<cmath>
#include<cstdio>
#include<cstring>
#include<cstdlib>
#include<iostream>
int main()
{
    int T, i, n, len, a, b, temp,j, k;
    char str[28] = "bcdefghijklmnopqrstuvwxyza", ch[2], letter[90010];
    scanf("%d",&T);
    while(T--)
    {
        scanf("%d%d%s",&len,&n,letter + 1);
        for(i = 0;i < n; i++)
        {
            scanf("%s",ch);
            if(ch[0] == 'Q')
            {
                scanf("%d",&a);
                printf("%c\n",letter[a]);
            }
            else if(ch[0] == 'R')
            {
                scanf("%d%d",&a,&b);
                for(j = a, k = b;j <= k; j++, k-- ){
                    temp = letter[j], letter[j] = letter[k], letter[k] = temp;}
            }
            else if(ch[0] == 'S')
            {
                scanf("%d%d",&a,&b);
                for(j = a; j <= b; j++)
                {
                    letter[j] = str[letter[j] - 'a'];
                }
            }
        }
    }
    return 0;
}