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'.
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Question: ninesevenfivetwofiveseventhreeninefourfive

Answer: 9752573945


Question: sixsevenninetwofoureightfive

Answer: 6792485


Question: zerooneseveneightfourfivetwozeroone

Answer:
017845201