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'.

Example Input: eightfourfourthreeeightfoursixtwofivesevensixseven
Example Output: 844384625767

Example Input: sixfivefourfoureightsix
Example Output: 654486

Example Input: foursixeightoneonefivezeroseven
Example Output:
46811507