Help me in solving VOWMTRX problem

help
,
1

My issue

it is giving wrong answer for 6 out of 7 testcases. I am not able to understand what’s the problem in the logic of my code.

My code

t=int(input())
m=pow(10,9)+7
for _ in range(t):
    n,k=map(int,input().split())
    s=input()
    res=1
    vowels=['a','e','i','o','u']
    vow=0
    midlet=1
    for i in range(n):
        if s[i] in vowels:
            vow+=1 
            if vow%(k+1)==0:
                res=(res * midlet) % m
                midlet=1
            else:
                midlet=1 
        else:
            midlet+=1
    print(res)

Problem Link: VOWMTRX Problem - CodeChef