#include<iostream> // cin\cout\endl #include<cstdio> //scanf()\printf() #include<cstring> // strcpy()\strcat()\strcmp()\strlen()\memset() #include<cmath> //sqrt()\pow()\abs()\ceil()\floor()\max()\min() using namespace std; int main(){ int n; cin >> n; int ge = n % 10; int shi = n / 10 % 10; int bai = n / 100 % 10; int qian = n / 1000 % 10; int m; m = bai * 10 + qian / 10 + ge * 10 + shi / 10; cout << m << " "; return 0; }