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

#define NX 2000010

char A[ NX ], B[ NX ];
int M, N, pi[ NX ], sol[ NX ], i, k;

void cit() {
	scanf( "%s %s", B + 1, A + 1 );
	M = strlen( A + 1 );
	N = strlen( B + 1 );
}

void calc_pi() {
	int i, k;
	for( k = pi[0] = -1, i = 1; i <= N; pi[ i++ ] = ++k )
		while( B[ i ] != B[ k+1] && k != -1 )
			k = pi[k];
}

void rez() {
//	int i, k;
	
	calc_pi();
	for( k = 0, i = 1; i <= M; i++ ) {
		while( A[i] != B[ k+1 ] && k != -1 )
			k = pi[k];
		if( ++k == N )
			sol[ ++sol[0] ] = i - N;
     }
}

void scr() {
	int i, min = 1000 < sol[0] ? 1000 : sol[0];
	
	printf( "%d\n", sol[0] );
	for( i = 1; i <= min; i++ )
		printf( "%d ", sol[i] );
}

int main() {
	freopen( "strmatch.in", "r", stdin );
	freopen( "strmatch.out", "w", stdout );

	cit();
	rez();
	scr();

	return 0;
}