#include <bits/stdc++.h>

using namespace std;

char a[2000005];
char b[2000005];
int v[2000005];
int rez[1005];

int main()
{
    freopen("strmatch.in", "r", stdin);
    freopen("strmatch.out", "w", stdout);
    scanf("%s%s", a, b);
    int k = -1, lr = 0, i, la;
    v[0] = -1;
    for(i = 1; a[i] != 0; i++)
    {
        while(k != -1 && a[k + 1] != a[i])
            k = v[k];
        if(a[k + 1] == a[i])
            k++;
        v[i] = k;
    }
    la = i - 1;
    k = -1;
    for(i = 0; b[i] != 0; i++)
    {
        while(k != -1 && a[k + 1] != b[i])
            k = v[k];
        if(a[k + 1] == b[i])
            k++;
        if(k == la)
        {
            if(lr < 1000)
                rez[lr] = i - la;
            lr++;
            k = v[k];
        }
    }
    printf("%d\n", lr);
    for(i = 0; i < min(1000, lr); i++)
        printf("%d ", rez[i]);
    return 0;
}