#!/bin/python3

import sys


n,q = input().strip().split(' ')
n,q = [int(n),int(q)]
s = input().strip()
sa = [ord(i) - ord('a') for i in s]
for a0 in range(q):
    qu = input().strip().split(' ')
    if int(qu[0]) == 1:
        start = int(qu[1])
        end =int(qu[2])
        t = int(qu[3])
        for i in range(start, end + 1):
            sa[i] = (sa[i] + t) % 26
    else:
        start = int(qu[1])
        end =int(qu[2])
        d = [0] * 27
        for i in range(start, end + 1):
            d[sa[i]] += 1
        ans = 1
        for i in range(27):
            if d[i]:
                ans = (ans * pow(2, d[i] - 1) )% 1000000007
        g = ans
        ans = (ans - 1 )% 1000000007
        for i in range(27):
            if d[i]:
                ans = (ans + g) % 1000000007

        print(ans)