Vasya最近学会了打字和上网。他立即进入了一个聊天室，并决定向大家打个招呼。Vasya输入了单词s。如果从输入的单词中删除几个字母后得到单词"hello"，则认为Vasya成功打招呼。例如，如果Vasya输入单词"ahhellllloou"，则认为他打招呼了，而如果他输入单词"hlelo"，则认为Vasya被误解了，他没有成功打招呼。确定Vasya是否成功打招呼，根据给定的单词s来判断。

Vasya has recently learned to type and log on to the Internet. He immediately entered a chat room and decided to say hello to everybody. Vasya typed the word s. It is considered that Vasya managed to say hello if several letters can be deleted from the typed word so that it resulted in the word "hello". For example, if Vasya types the word "ahhellllloou", it will be considered that he said hello, and if he types "hlelo", it will be considered that Vasya got misunderstood and he didn't manage to say hello. Determine whether Vasya managed to say hello by the given word s.