#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,b,c,d,e; cin>>e; a=e/1000; b=e/100%10; c=e/10%10; d=e%10; cout<<a*100+b*10+c+d*1000<<endl; return 0; }