#include <cstdio>
#include <cstring>
#include <algorithm>

using namespace std;

char sir1[2000010],sir2[2000010];
int sol[1010],pi[2000010];

int main()
{
    freopen("strmatch.in", "r", stdin);
    freopen("strmatch.out", "w", stdout);
    scanf("%s\n%s",sir1+1,sir2+1);
    int l1=strlen(sir1+1),l2=strlen(sir2+1),nr=0;
    for(int i=2,k=0;i<=l1;i++)
    {
        while(k && sir1[k+1]!=sir1[i]) k=pi[k];
        if(sir1[k+1]==sir1[i]) k++;
        pi[i]=k;
    }
    for(int i=1,k=0;i<=l2;i++)
    {
        while(k && sir1[k+1]!=sir2[i]) k=pi[k];
        if(sir1[k+1]==sir2[i]) k++;
        if(k==l1)
        {
            nr++;
            if(nr<=1000) sol[nr]=i-l1;
            k=pi[k];
        }
    }
    printf("%d\n",nr);
    for(int i=1;i<=min(nr,1000);i++) printf("%d ",sol[i]);
    return 0;
}