#include<cstdio>
#include<cstring>
#include<vector>
using namespace std;
char A[2000010],B[2000010];
int pi[2000010],LA,LB,nr;
vector<int> sol;
void prefix()
{
    int q=0;
    pi[1]=0;
    for(int i=2;i<=LA;i++)
    {
        while(q>0&&A[q+1]!=A[i]) q=pi[q];
        if(A[q+1]==A[i]) q++;
        pi[i]=q;
    }
}
void potrivire()
{
    int q=0;
    for(int i=1;i<=LB;i++)
    {
        while(q>0&&A[q+1]!=B[i]) q=pi[q];
        if(A[q+1]==B[i]) q++;
        if(q==LA)
        {
            nr++;
            if(nr<=1000) sol.push_back(i-q);
        }
    }
}

int main()
{
    freopen("strmatch.in","r",stdin);
    freopen("strmatch.out","w",stdout);
    scanf("%s%s",A+1,B+1);
    LA=strlen(A+1);
    LB=strlen(B+1);
    prefix();
    potrivire();
    printf("%d\n",nr);
    for(vector<int>::iterator it=sol.begin();it!=sol.end();it++) printf("%d ",*it);
    return 0;
}