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:
zerosevenonefourthreeninefive
answer:
0714395


question:
fourfourfourfivefiveeightzeroninesix
answer:
444558096


question:
zerothreeseventhreezerothreefiveeightone
answer:

037303581