In this task you will be given a string that only contains single digit numbers spelled out. The input string will not contain spaces between the different numbers. Your task is to return the number that the string spells out. The string will spell out each digit of the number for example '1726' will be 'oneseventwosix' instead of 'one thousand seven hundred six'.

Ex Input:
zerothreeeightnineseven

Ex Output:
03897


Ex Input:
threeonesixfoursevenseveneightninethreetwonine

Ex Output:
31647789329


Ex Input:
eightfivetwozeroeightsevenonesixzerotwo

Ex Output:

8520871602