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

using namespace std;

const int nmx = 2000005;

char a[nmx],b[nmx];
int la,lb;
int p[nmx],dp[nmx];
vector <int> ans;

void citire()
{
    scanf("%s", a);
    la = strlen(a);
    scanf("%s", b);
    lb = strlen(b);
}

void prefix()
{
    int i = 1, j = 0;

    while(i < la)
    {
        if(a[i] == a[j])
        {
            p[i] = p[i-1] + 1;
            ++ i;
            ++ j;
        }
        else if(j)
            j = p[j-1];
        else
            ++ i;
    }
}

void kmp()
{
    int i = 0, j = 0;

    while(i < lb)
    {
        if(b[i] == a[j])
        {
            dp[i+2] = dp[i+1] + 1;
            ++ i;
            ++ j;
            if(j == la)
                ans.push_back(i-la);
        }
        else if(j)
            j = p[j-1];
        else
            ++ i;
    }
}

void afish()
{
    printf("%d\n", ans.size());
    for(vector<int>::iterator it = ans.begin(); it != ans.end(); ++it)
        printf("%d ", *it);
}

int main()
{
    freopen("strmatch.in", "r", stdin);
    freopen("strmatch.out", "w", stdout);
    citire();
    prefix();
    kmp();
    afish();
    return 0;
}