Hissing Microphone

Some microphones have a hissing s problem. The sound of the letter s comes out much louder than the rest of the word, and it grates on the listener.

The worst offenders are words that contain the letter s twice in a row. Words like amiss, kiss, mississippi, and hiss itself.

The first line contains a single string. The string consists of lowercase letters only, contains no spaces, and has between 1 and 30 characters.

Print a single line. If the input string contains two consecutive occurrences of the letter s, print hiss. Otherwise print no hiss.