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:
onezerotwozeroeighttwoone

Ex Output:
1020821


Ex Input:
sixzerofivesixthreefiveonesixnineeightfourthree

Ex Output:
605635169843


Ex Input:
fivefourfiveonethreethreesevenzerosix

Ex Output:

545133706