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:
twofivesixnineeighttwosevenzeroeighttwofiveseven

Ex Output:
256982708257


Ex Input:
threesixzerofourthreesixoneninesevensix

Ex Output:
3604361976


Ex Input:
zerothreethreeninethreesixseveneightninefiveone

Ex Output:

03393678951