#include <stdio.h>
#include <string.h>

char A[1001], B[1001];

void process (){
	int i, u;
	int a[26]={0,}, b[26]={0,};
	
	for (i=0; i<strlen ( A ); i++) a[A[i]-'a']++;
	for (i=0; i<strlen ( B ); i++) b[B[i]-'a']++;
	
	for (i=0; i<26; i++){
		for (u=0; u<a[i] && u<b[i]; u++){
			printf ( "%c", i+'a' );
		}
	}
	
	printf ( "\n" );
}

int main (){
	while (scanf ( "%s%s", &A, &B )){
		if (!A[0] || !B[0]) return 0;
		process ();
	}
	return 0;
}

• while (scanf ( "%s%s", &A, &B )!=EOF) (530) wanpiOuser 2005-12-27 22:38:28
• 输入有问题,测试数据中有空行的,小心! (530) davydc 2005-12-28 10:52:49