s = input()
cnt = 0
psp = []
for i in range(len(s)):
    if s[i] == '(' or s[i] == '[' or s[i] == '{':
        psp.append(s[i])
    else:
        if len(psp) > 0 and psp[-1] == s[i]:
            psp.pop()
        else:
            print("hui sosi")
            exit()
if len(psp) > 0:
    print("hui sosi")
else:
    print("ne sosi")