#include <iostream>
#include <cstdio>
#include <cctype>
#include <iomanip>
#include <stdlib.h>
#include <cstring>
#define SIZE 30

void swap(char * a[]){
    char temp[10];
    strcpy(temp,*a[0]);
    strcpy(*a[0],*a[2]);
    strcpy(*a[2],temp);
}

//returnType (*functionName)(paramType1, paramType2, ...)
using namespace std;

int main(){
    //part 1
    char ab[2][10], c[10], d[10];
    char * array[4];
    char * temp;
    
    fgets(ab[0],10,stdin);
    strtok(ab[0],"\n");
    fgets(ab[1],10,stdin);
    strtok(ab[1],"\n");
    fgets(c,10,stdin);
    strtok(c,"\n");
    fgets(d,10,stdin);
    strtok(d,"\n");
    //end part 1
    
    //part 2
    array[0]=ab[0];
    array[1]=ab[1];
    array[2]=c;
    array[3]=d;
    //end part 2
    //part 3
    temp=array[1];
    array[1]=array[3];
    array[3]=temp;
    //end part 3
    //part 4
    swap(array);
    //end part 4
    //part 5
    
    //end part 5
    system("pause");
}