#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 a,z,x,c,v; cin>>a; z=a/1000; x=a/100%10; c=a/10%10; v=a%10; cout<<x<<z<<v<<c; //cout<<z<<x<<c<<v; return 0; }