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#include<stdio.h>
void print(char *a,int la,char *b,int lb){
	int i;
	int ch=0;
	if(la!=lb){
		ch=1;
	}
	else{
		for(i=0;i<la;i++){
			if(a[i]!=b[i]){
				ch=1;
			}
		}
	}

	if(ch==1){
		for(i=la;i<la+lb;i++){
			a[i]=b[i-la];
		}
	}
	printf("%s",a);
}

main(){
	char a[50],b[50];
	int i,la,lb;
	scanf("%s %s",a,b);
	for(la=0;a[la]!='\0';la++);
	for(lb=0;b[lb]!='\0';lb++);
	print(a,la,b,lb);
}