flutter symmetry day

A symmetrical day calculation written when bored, for example: 2021/1202 - 2021/1202

void main(List<String> args) {
    
     
   List b = [];
   for(var a = 1000; a <= 3000; a++){
    
    
     for(var a1 = 1 ; a1 <= 13; a1++){
    
    
       for(var a2 = 1 ; a2 <= 32; a2++){
    
    
              args = [ a.toString() + (a1 >= 10 ? a1.toString():("0"+a1.toString()) ) +  (a2 >= 10 ? a2.toString():("0"+a2.toString()))]; 
         var s = a.toString() + (a1 >= 10 ? a1.toString():("0"+a1.toString()) ) +  (a2 >= 10 ? a2.toString():("0"+a2.toString()));
              if(s == reverse(args[ 0 ])){
    
    
               b.add(a.toString() + "/" + (a1 >= 10 ? a1.toString():("0"+a1.toString()) ) + "/" + (a2 >= 10 ? a2.toString():("0"+a2.toString())));
              }
       }
     }
       

//      print( reverse(args[ 0 ]) ); 
    
     
   }
   print(b);
   print(b.length);
      }
      
     String reverse(input) {
    
     
     return input.split( '' ).reversed.join(); //input.split( ).reversed.join();  }