S = input()
count = 0
for i in range(len(S)-1):
    if S[i] == "m" and S[i+1] == "i":
        for j in range(i+2,len(S)):
            if S[j] == "n":
                count += 1
            elif S[j] == "-":
                pass
            else:
                break
print(count)