S = input().strip()
count = 0
i = 0
n = len(S)

while i < n:
    if i + 1 < n and S[i] == 'm' and S[i+1] == 'i':
        j = i + 2
        while j < n and S[j] == '-':
            j += 1
        if j < n and S[j] == 'n':
            count += 1
            i = j + 1
        else:
            # According to the problem statement, this case will not occur
            i += 1
    else:
        i += 1

print(count)