HELLO EVERYONE!

Niharika has recently learned to type and surfing on the Internet. She has a habit of entering a virtual chat room and to say hello to everybody. During chatting, Niharika typed the word s. In chatting, it is considered that Niharika manages to say "Hello" to everyone if several letters can be deleted from the typed word so that it results in the word formation of "hello" word. For example, if Ni