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

typedef vector<int> vii;
typedef vector<long long> vll;

#define MOD (long long)(1e9+7)
#define eps  1e-9
#define ll  long long
#define F first
#define mp make_pair
#define S second
#define fill(a,val) memset(a, (val), sizeof(a))
#define pb push_back
#define fast ios_base::sync_with_stdio(false),cin.tie(0),cout.tie(0)
const int  N  = (1e5 + 9);
#define INF (long long )(1e9 + 7)


//FILE *fin = freopen("cubes.in","r",stdin);

//FILE *fout = freopen("out.txt","w",stdout);



ll inv(ll a,ll p)
{ ll temp=1;
  while(p!=0)
  { if(p%2==1)
      temp=(temp*a)%INF;
    a=((ll)a*a)%INF;
    p=p/2;
  }
  return temp;
}

int main() {
  fast;
  //FILE *fin = freopen("huffman.in","r",stdin);
  //FILE *fout = freopen("huffman.out","w",stdout);
  int n;
  cin>>n;
  int q;
  cin>>q;
  int ar[100009];
  for(int i=0;i<n;i++){
  	char c;
  	cin>>c;
  	ar[i]=c-'a';
  	//cout<<ar[i]<<" ";
  }
  //cout<<endl;
  while(q--){
  	int op;
  	cin>>op;
  	int i,j;
  	cin>>i>>j;
  	if(op==1){
  		int t;
  		cin>>t;
  		for(int p=i;p<=j;p++){
  			ar[p] =(ar[p] + t)%26;
  		}
  	}
  	else{
  		int freq[26];
  		fill(freq,0);
  		for(int p=i;p<=j;p++){
  			freq[ar[p]]++;
  		}
  		//cout<<freq[0]<<" "<<freq[1]<<"BABA"<<endl;
  		ll coun=0;
  		for(int num=0;num<=25;num++) if(freq[num]>0) coun++;
  		ll po=1;
  		for(int x1=0;x1<j-i+1-coun;x1++) po= (po*2)%MOD;
  			cout<<((coun+1)*(po)%MOD -1 + MOD)%MOD<<endl;
  	}
  }
  return 0;
  
}