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

using namespace std;
char A[2000005],B[2000005]; /// 2 milioane Xd nu 1 mil my fault
int nrap,N,M;
int P[2000005];
vector<int> pos;

void read()
{
    scanf("%s%s",A+1,B+1);
    A[0] = B[0] = '#';
    N = strlen(A) - 1;
    M = strlen(B) - 1;
}

void make_prefix()
{
    int i , q = 0;
    for(int i = 2; i <= N; ++i)
    {
        while(q && A[i] != A[q+1])
            q = P[q];
        q += (A[i] == A[q+1]);
        P[i] = q;
    }
}

void make_match()
{
    int i , q = 0;
    for(int i = 1; i <= M; ++i)
    {
        while(q && B[i] != A[q+1])
            q = P[q];
        q += (B[i] == A[q+1]);
        if(q == N)
        {
            ++nrap;
            q = P[q];
            if(pos.size() < 1000) pos.push_back(i-N);
        }
    }
}

void KMP()
{
    make_prefix();
    make_match();
}

void print()
{
    printf("%d\n",nrap);
    for(int i = 0; i <(int) pos.size(); ++i)
        printf("%d ",pos[i]);
}

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

    read();
    KMP();
    print();

    return 0;
}