instruction:
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'.
question:
sevenninefourzerosixninenineonezeroseventwozero
answer:
794069910720


question:
sixeightfiveonefourtwofoursevenfiveninesixtwo
answer:
685142475962


question:
sixthreefivethreefourninefourzerofivezeroeightsix
answer:

635349405086