鬼才方法 num = int(input()) num3 = (num//1000+3)%9 num1 = (num//10%10+3)%9 num4 = (num//100%10+3)%9 num2 = (num%10+3)%9 print(num1,end='') print(num2,end='') print(num3,end='') print(num4,end='')