#include <cstdio>
#include <cstring>

using namespace std;

char sir1[2000010],sir2[2000010];
int d[2000010],rez[1010];

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