#include "stdio.h"
#include "string.h"
#include "ctype.h"
int reverse(char x[]);
int itoa(int n, char s[]);
int atoi(char s[]);
int main()
{
int n;
char s1[1000],s2[1000];
int k;
scanf("%d",&n);
while(n-- >0){
scanf("%s%s",s1,s2);
reverse(s1);
reverse(s2);
k=atoi(s1) + atoi(s2);
itoa(k,s1);
k=atoi(s1);
printf("%d\n",k);
}
return 0;
}
int reverse(char x[])
{
int i,j;
char a;
for(i=0,j=strlen(x)-1;i 0); /* delete it */
s = '\0';
return 0;
}
int atoi(char s[])
{
int i, n, sign;
for (i = 0; isspace(s); i++) /* skip white space */
;
sign = (s == ' ')? 1: 1;
if (s == '+' || s == ' ')/* skip sign */
i++;
for (n = 0; isdigit(s); i++)
n = 10 * n + (s -'0');
return sign * n;
}
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