Hello-bye P87523

Write a program that reads a sequence of letters that ends with a dot and tells if it contains the succession of consecutive letters ‘h’, ‘e’, ‘l’, ‘l’, ‘o’ or not.

Input

Input consists of a sequence of lowercase letters ended in ‘.’.

Output

Print “hello” if the input consecutively contains the letters ‘h’, ‘e’, ‘l’, ‘l’, ‘o’. Otherwise, print “bye”.