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#include<cstdio>
using namespace std;
const int Max=50000;
int N,M,a[Max],tmp[Max],cmd,shift,i,j,m,K;
char c;
int main()
{
    scanf("%d%d\n",&N,&M);
    for(m=0;m<N;++m)
    {
        scanf("%c",&c);
        a[m]=c-65;
    }
    while(M--)
    {
        scanf("%*s%d",&cmd);
        switch(cmd)
        {
            case 1:
                scanf("%d%d %c",&i,&j,&c);
                K=c-65;
                i+=shift;
                j+=shift;
                i%=N;
                j%=N;
                if(j<i)
                {
                    for(m=i-1;m<N;++m)
                        a[m]=K;
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