#include <cstdio>
#include <cstring>
#include <cassert>

#include <fstream>
#include <algorithm>
#include <vector>
#include <string>
#include <queue>
#include <map>

using namespace std;

typedef long long LL;
typedef vector<int>::iterator it;

const int oo = 0x3f3f3f3f;
const int MAX_N = 2000005;
const int MAX_MATCH = 1000;

int N, M, MatchCount;
char Pattern[MAX_N], String[MAX_N];
vector<int> MatchPositions;
//int Pi[MAX_N];
int Z[MAX_N];

/*void BuildPi() {
    Pi[1] = 0;
    for (int i = 1, p = 0; i < N; ++i) {
        for (; p > 0 && Pattern[i + 1] != Pattern[p + 1]; p = Pi[p]);
        p += (Pattern[i + 1] == Pattern[p + 1] ? 1 : 0);
        Pi[i + 1] = p;
    }
}

void KMP() {
    BuildPi();
    for (int i = 1, p = 0; i <= M; ++i) {
        for (; p > 0 && String[i] != Pattern[p + 1]; p = Pi[p]);
        p += (String[i] == Pattern[p + 1] ? 1 : 0);
        if (p == N) {
            ++MatchCount;
            if (MatchCount <= MAX_MATCH)
                MatchPositions.push_back(i - N + 1);
        }
    }
}*/

void BuildZ() {
    int Right = 0, Position = 0;
    for (int i = 2; i <= N; ++i) {
        if (Right >= i)
            Z[i] = min(Right - i + 1, Z[i - Position + 1]);
        for (; i + Z[i] <= N && Pattern[Z[i] + 1] == Pattern[i + Z[i]]; ++Z[i]);
        if (i + Z[i] - 1 > Right) {
            Position = i;
            Right = i + Z[i] - 1;
        }
    }
}

void ZAlgorithm() {
    BuildZ();
    int Right = 0, Position = 0;
    for (int i = 1; i <= M; ++i) {
        int LCP = 0;
        if (Right >= i)
            LCP = min(Right - i + 1, Z[i - Position + 1]);
        for (; LCP < N && i + LCP <= M && Pattern[LCP + 1] == String[i + LCP]; ++LCP);
        if (i + LCP - 1 > Right) {
            Position = i;
            Right = i + LCP - 1;
        }
        if (LCP == N) {
            ++MatchCount;
            if (MatchCount <= MAX_MATCH)
                MatchPositions.push_back(i);
        }
    }
}

void Solve() {
    //KMP();
    ZAlgorithm();
}

void Read() {
    assert(freopen("strmatch.in", "r", stdin));
    assert(scanf("%s\n%s", Pattern + 1, String + 1) == 2);
    N = strlen(Pattern + 1);
    M = strlen(String + 1);
}

void Print() {
    assert(freopen("strmatch.out", "w", stdout));
    printf("%d\n", MatchCount);
    for (it P = MatchPositions.begin(); P != MatchPositions.end(); ++P)
        printf("%d ", *P - 1);
    printf("\n");
}

int main() {
    Read();
    Solve();
    Print();
    return 0;
}