#include <bits/stdc++.h>

using namespace std;

char A[2000010],B[2000010];
int d[2000010],ans[1010];

int main()
{
    freopen("strmatch.in","r",stdin);
    freopen("strmatch.out","w",stdout);
    scanf("%s\n",A+1);
    scanf("%s",B+1);
    int c=strlen(A+1),k=0,l=strlen(B+1),r=0,sol=0;
    for(int i=2;i<=c;i++)
    {
        while(k>0 && A[i]!=A[k+1]) k=d[k];
        if(A[i]==A[k+1]) k++;
        d[i]=k;
    }
    k=0;
    for(int i=1;i<=l;i++)
    {
        while(k>0 && B[i]!=A[k+1]) k=d[k];
        if(B[i]==A[k+1]) k++;
        if(k==c)
        {
            sol++;
            if(r<1000) ans[++r]=i-c;
        }
    }
    printf("%d\n",sol);
    for(int i=1;i<=r;i++) printf("%d ",ans[i]);
    return 0;
}