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    Javascript

    function permutationEquation(p) {
        // Write your code here
      let index1 = [];
      let index2 = [];
    
    
    for(let i = 1; i <= p.length; i++){
          
        index1.push(p.indexOf(i)+1)
    }
    
     
     index1.forEach(index => {
         index2.push(p.indexOf(index)+1)
     })
     
     return index2;
    }