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: onefivefivezerozerothreesix

Answer: 1550036


Question: twotwosevenzerosixtwofivetwothree

Answer: 227062523


Question: eightfourfivezerofivethreefouroneeightsixseventwo

Answer:
845053418672