View Code of Problem 22

#include<stdio.h>
int main(){
	int la,lb,lc,i,j,k;
  	char a[1000],b[1000],c[1000],t;
  while(gets(a)!=NULL){
  	gets(b);
    	la=strlen(a);
    	lb=strlen(b);
    	k=0;
    for(i=0;i<la;i++){
      for(j=0;j<lb;j++){
      	if(a[i]==b[j]){
        	c[k++]=a[i];
          	b[j]='*';
          	break;
        }
      }
    }
    for(i=0;i<k;i++){
      for(j=i+1;j<k;j++){
      	if(c[i]>c[j]){
        	t=c[i];
          	c[i]=c[j];
          	c[j]=t;
        }
      }
    }
    c[k]='\0';
    puts(c);
  }
  return 0;
}

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