text: /*
  Description:
  You are given an input string.
  
  For each symbol in the string if it's the first character occurence, replace it with a '1', else replace it with the amount of times you've already seen it...
  
  But will your code be performant enough?
  
  Examples:
  input   =  "Hello, World!"
  result  =  "1112111121311"
  
  input   =  "aaaaaaaaaaaa"
  result  =  "123456789101112"
  */
  function numericals(s){
    const obj={}
    return s.replace(/./g,v=>obj[v]=(obj[v]||0)+1)
  }
  