#include<cstdio>
#include<cstring>
using namespace std;
const int NMAX = 2000005;
char A[NMAX],B[NMAX];
int N,M,pi[NMAX],q,Cnt,i,Sol[1005];
int main()
{
    freopen("strmatch.in","r",stdin);
    freopen("strmatch.out","w",stdout);
    scanf("%s",A+1); scanf("%s",B+1);
    N=strlen(A+1); M=strlen(B+1);
    pi[1]=0;
    for(i=2;i<=N;i++)
    {
        while(q && A[q+1]!=A[i]) q=pi[q];
        if(A[q+1]==A[i]) q++;
        pi[i]=q;
    }
    for(q=0,i=1;i<=M;i++)
    {
        while(q && A[q+1]!=B[i]) q=pi[q];
        if(A[q+1]==B[i]) q++;
        if(q==N && ++Cnt<=1000) Sol[Cnt]=i-N;
    }
    printf("%d\n",Cnt);
    for(i=1;i<=Cnt;i++) printf("%d ",Sol[i]);
    return 0;
}