[t105] RNA

#include <stdio.h>
#include <algorithm>
using namespace std;

const int N = 510;
char A[N], B[N];

int main()
{
    int n, m;
    scanf("%d %s %s%d", &n, A, B, &m);
    while (m--) {
        int l, r;
        scanf("%d%d", &l, &r);
        for (int i = l; i <= r; ++i)
            swap(A[i-1], B[i-1]);
    }
    printf("%s\n", A);
    printf("%s\n", B);

    return 0;
}