Why does this work only 4/5 cases

Question

I have a code for no numerals and it works only 4 out of 5 cases
string = gets

string.gsub!(/1/, "one")
string.gsub!(/0/, "zero")
string.gsub!(/2/, "two")
string.gsub!(/3/, "three")
string.gsub!(/4/, "four")
string.gsub!(/5/, "five")
string.gsub!(/6/, "six")
string.gsub!(/7/, "seven")
string.gsub!(/8/, "eight")
string.gsub!(/9/, "nine")
string.gsub!(/10/, "ten")
puts string

Answer 1

10 will not be ten, but rather one zero because you put string.gsub!(/1/, "one") and string.gsub!(/0/, "zero") before string.gsub!(/10/, "ten"). They will be found first and modify the string before 10 can get matched.

Put string.gsub!(/10/, "ten") before string.gsub!(/1/, "one")

Answer 2

Ohhh i get it thank you