#include <cstdio>
#include <cstring>
#include <vector>

using namespace std;

#define FIN "strmatch.in"
#define FOUT "strmatch.out"

#define MAX 2000001
#define P 100003
#define Size 63

int L, R;

char A[MAX], B[MAX];

vector <int> H[P];

inline char cod(char X)
{
    if (X >= '0' && X <= '9')
        return 1 + X - '0';

    if (X >= 'a' && X <= 'z')
        return 11 + X - 'a';

    return 37 + X - 'A';
}

int main()
{
    int i, x;

    freopen(FIN, "r", stdin);
    freopen(FOUT, "w", stdout);

    gets(B);
    gets(A);
    L = strlen(B) - 1;

    for (i = R = 1; i < L; ++ i)
        R = (R * Size) % P;

    for (i = x = 0; A[i]; ++ i)
    {
        if (i >= L)
            x = (P + x - cod(A[i - L]) * R % P) % P;

        x = (x * Size + cod(A[i])) % P;

        if (i >= L - 1)
            H[x].push_back(i - L + 1);
    }

    for (i = x = 0; i < L; ++ i)
        x = (x * Size + cod(B[i])) % P;

    printf("%d\n", H[x].size());

    for (i = 0; i < H[x].size(); ++ i)
        printf("%d ", H[x][i]);
    printf("\n");
}