#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <math.h>

int main()

{

    int counta = 0, countb = 0;

    int pa=0,pb=0;

    char a[10], b[10];

    int da, db;

    scanf("%s %d %s %d", a, &da, b, &db);

    int i = 0;

    while (a[i] != '\0')

    {

        if (a[i] ==da+48 )

        {

            counta++;

        }

        i++;

    }

    i=0;

    while (b[i] != '\0')

    {

        if (b[i] == db+48)

        {

            countb++;

        }

        i++;

    }

    if (counta != 0)

    {

        while (counta > 0)

        {

            counta--;

            pa = pa +da * pow(10,counta);

        }

    }

    if (countb != 0)

    {

        while (countb >0)

        {

            countb--;

            pb = pb +db  * pow(10,countb);

        }

    }

    printf("%d", pa + pb);

    return 0;

}