text: function solve(args) {
          let digit = +args[0];
  
          switch (digit) {
                  case 0:
                          console.log('zero')
                          break;
                  case 1:
                          console.log('one')
                          break;
                  case 2:
                          console.log('two')
                          break;
                  case 3:
                          console.log('three')
                          break;
                  case 4:
                          console.log('four')
                          break;
                  case 5:
                          console.log('five')
                          break;
                  case 6:
                          console.log('six')
                          break;
                  case 7:
                          console.log('seven')
                          break;
                  case 8:
                          console.log('eight')
                          break;
                  case 9:
                          console.log('nine')
                          break;             
                  default:
                          console.log('not a digit');
                          break;
          }        
  }
  
  solve(['0']);