# include <fstream>
# include <cstring>
 
# define minim(a, b) ((a < b) ? a : b)
# define NMax 2000005

using namespace std;

ifstream f("strmatch.in");
ofstream g("strmatch.out");
 
int M, N;
char A[ NMax ], B[NMax];
int pi[ NMax ], pos[1024];
 
void make_prefix(void)
{
    int i, q = 0;
 
    for (i = 2, pi[1] = 0; i <= M; ++i)
    {
        while (q && A[q+1] != A[i])
            q = pi[q];
        if (A[q+1] == A[i])
            ++q;
        pi[i] = q;
    }
}
 
int main(void)
{
    int i, q = 0, n = 0;
     
   // freopen("strmatch.in", "r", stdin);
   // freopen("strmatch.out", "w", stdout);
	
 
    //fgets(A, sizeof(A), stdin);
    //fgets(B, sizeof(B), stdin);
	f.getline( A, sizeof( A ) );
	f.getline( B, sizeof( B ) );
    //for (; ( A[M] >= 'A' && A[M] <= 'Z' ) || ( A[M] >= 'a' && A[M] <= 'z' ) || ( A[M] >= '0' && A[M] <= '9' ); ++M );
    //for (; ( B[N] >= 'A' && B[N] <= 'Z' ) || ( B[N] >= 'a' && B[N] <= 'z' ) || ( B[N] >= '0' && B[N] <= '9' ); ++N );
	M = strlen(A) ;
	N = strlen(B) ;
	//g << M << " " << N << "\n";
    for (i = M; i; --i) A[i] = A[i-1]; A[0] = ' ';
    for (i = N; i; --i) B[i] = B[i-1]; B[0] = ' ';
	//g << A << "\n";
	//g << B << "\n";
     
    make_prefix();
     
    for (i = 1; i <= N; ++i)
    {      
        while (q && A[q+1] != B[i])
            q = pi[q];
        if (A[q+1] == B[i])
            ++q;
        if (q == M)
        {
            q = pi[M];
            ++n;
            if (n <= 1000)
                pos[n] = i-M;  
        }  
    }      
 
    g << n << "\n";
    for (i = 1; i <= minim(n, 1000); ++i)
		g << pos[ i ] << " ";
        //printf("%d ", pos[i]);
    g << "\n";
             
    return 0;
}