As you can probably tell, I am not very good at coding, so I might have made basic errors This is my code for https://codeforces.net/gym/102942/problem/E Can someone tell me what I am doing wrong? im using PyPy3 64 bit interpreter

import math

t = int(input())
n = []
s = []
for _ in range(t):
    n.append(int(input()))
    s.append(input())

def password(n, s):
    dict = {}
    j = 0

    for i in s:
        if i != '-':
            dict[j] = int(i)
        j += 1

    indices = list(dict.keys())
    z = [dict[p] for p in indices]

    if z:
        if z != sorted(z):
            return 0
        else:
            def permutation(space, value):
                return math.factorial(space + value - 1) // (math.factorial(space) * math.factorial(value - 1))

            k = len(indices)
            ways = 1

            for x in range(k - 1):
                ways *= permutation(indices[x + 1] - indices[x] - 1, dict[indices[x + 1]] - dict[indices[x]] + 1)

            ways *= permutation(indices[0], dict[indices[0]])

            ways *= permutation(n - 1 - indices[k - 1], 10 - dict[indices[k - 1]])

            return ways % ((10 ** 9) + 7)
    else:
        return 9 ** n % ((10 ** 9) + 7)

for i in range(t):
    print(password(n[i], s[i]))