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#include<stdio.h>

int lcs(char* a, char* b, int na, int nb);
int strlen(char* s);

int main(void){

	char a[1002];
	char b[1002];
	int na;
	int nb;

	while(scanf("%s %s",a,b)!=EOF){
		na=strlen(a);
		nb=strlen(b);
		printf("%d\n",lcs(a,b, na, nb));
	}

	return 0;
}

int strlen(char* s){

	char* tmp=s;
	int count=0;
	
	while(*tmp != '\0'){
		count++;
		tmp++;
	}

	return count;
}

int lcs(char* a, char* b, int na, int nb){

	int i,j,x,y;
	int tmp[na+1][nb+1];

	for(i=0; i<=na; i++)
		tmp[i][0]=0;
	for(i=0; i<=nb; i++)
		tmp[0][i]=0;

	for(i=1,x=0; i<=na; i++,x++){
		for(j=1,y=0; j<=nb; j++,y++){
			if( b[y] == a[x] )
				tmp[i][j]=tmp[x][y]+1;
			else if( tmp[x][j] > tmp[i][y] )
				tmp[i][j]=tmp[x][j];
			else
				tmp[i][j]=tmp[i][y];
		}
	}

	return tmp[na][nb];
}