#include<iostream>
#include<string.h>

using namespace std;

void difference(char *a, char *b, char *diff) {
    int len = strlen(a), i;
    char temp[102];
    for(i=0; i<len; i++)
        temp[i] = a[i];
    temp[i] = '\0';
    for(int i=len-1; i>=0; i--) {
        if(temp[i]>=b[i]) {
            diff[i] = temp[i] - b[i] + '0';
        }
        else {
            for(int j=i-1; j>=0; j--) {
                if(temp[j] - '0' > 0) {
                    temp[j] = temp[j] - 1;
                    diff[i] = 10 + a[i] - b[i] + '0';
                    break;
                } else {
                    temp[j] = 9 + '0';
                }
            }
        }
    }
}

void divide(char *a) {
    int r=0;
    char temp[strlen(a)];
    for(int i=0; i<strlen(a); i++)
        temp[i] = a[i];
    for(int i=0; i<strlen(a); i++) {
        a[i] = (int)(a[i] - '0' + 10*r)/2 + '0';
        r = (int)(temp[i] - '0' + 10*r)%2;
    }
}

int main () {
    int t=10, i;
    char tot[102], k[102];
    char sum[103], diffArr[102];
    while(t) {
        cin>>tot>>k;
        int totlen = strlen(tot);
        int klen = strlen(k);
        for(i=0; i<totlen+1; i++)
            sum[i] = '0';
        sum[i] = '\0';
        for(i=0; i<totlen; i++)
            diffArr[i] = '0';
        diffArr[i] = '\0';
        if(totlen>klen) {
            int diff = totlen - klen;
            k[klen+diff] = '\0';
            for(i=klen-1; i>=0; i--) {
                k[i+diff] = k[i];
            }
            for(i=0; i<diff; i++) {
                k[i] = '0';
            }
            // difference
            difference(tot, k, diffArr);
        } else {
            if(tot[0]>k[0])
                difference(tot, k, diffArr);
            else
                difference(k, tot, diffArr);
        }

        // sum
        totlen = strlen(tot);
        int remainder = 0;
        for(i=totlen-1; i>=0; i--) {
            sum[i+1] = (tot[i] - '0' + k[i] - '0' + remainder)%10 + '0';
            remainder = (tot[i] - '0' + k[i] - '0' + remainder)/10;
        }
        sum[i+1] = remainder + '0';

        //divide
        divide(sum);
        divide(diffArr);
        int flag=0;
        for(i=0; i<strlen(sum); i++) {
            if(sum[i] != '0')
                flag = '1';
            if(flag=='1')
                cout<<sum[i];
        }
        cout<<endl;
        flag=0;
        for(i=0; i<strlen(diffArr); i++) {
            if(diffArr[i] != '0')
                flag = '1';
            if(flag=='1')
                cout<<diffArr[i];
            if(flag!='1' && i==strlen(diffArr)-1)
                cout<<diffArr[i];
        }
        cout<<endl;
        t--;
    }
}