View Code of Problem 22

#include<stdio.h>
#include<string.h>
int main()
{
	char a[1000],b[1000];
	int first[1000]={0};
	while(gets(a))
	{
	gets(b);
	memset(first,0,sizeof(first));
	int i,j;
	for(i=0;a[i]!='\0';i++)
	{
        for(j=0;b[j]!='\0';j++)
		{
			if(!first[j]&&a[i]==b[j])
			{
				putchar(b[j]);
				first[j]=1;
				break;
			}
		}
	}
	printf("\n");
	}
	return 0;
}

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