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

#define MAXN 2000001

#define P 73
#define MOD1 100007
#define MOD2 100021

char A[MAXN], B[MAXN];
int NA, NB;

int hashA1, hashA2, P1, P2;

int match[MAXN];

int main()
{
    freopen("strmatch.in", "rt", stdin);
    freopen("strmatch.out", "wt", stdout);

    scanf("%s %s", A, B);
    NA = strlen(A);
    NB = strlen(B);

    P1 = P2 = 1;
    hashA1 = hashA2 = 0;
    for (int i = 0; i < NA; i++)
    {
        hashA1 = (hashA1 * P + A[i]) % MOD1;
        hashA2 = (hashA2 * P + A[i]) % MOD2;

        if (i != 0)
            P1 = (P1 * P) % MOD1,
            P2 = (P2 * P) % MOD2;
    }

    if (NA > NB)
    {
        printf("0\n");
        return 0;
    }

    int hash1 = 0, hash2 = 0;
    for (int i = 0; i < NA; i++)
        hash1 = (hash1 * P + B[i]) % MOD1,
        hash2 = (hash2 * P + B[i]) % MOD2;

    int Nr = 0;
    if (hash1 == hashA1 && hash2 == hashA2)
        match[++match[0]]=1;
        //match[0] = 1, Nr++;

    for (int i = NA; i < NB; i++)
    {
        hash1 = ((hash1 - (B[i - NA] * P1) % MOD1 + MOD1) * P + B[i]) % MOD1;
        hash2 = ((hash2 - (B[i - NA] * P2) % MOD2 + MOD2) * P + B[i]) % MOD2;

        if (hash1 == hashA1 && hash2 == hashA2){
            match[0]++;
            if(match[0]<=1001) match[match[0]]=i-NA+1;
        }
    }
    printf("%d\n", match[0]);

    Nr = 0;
    for (int i = 1; i <= 1001 && i<=match[0]; i++)
            printf("%d ", match[i]);
    printf("\n");

    return 0;
}