#include<cstdio>
#include<cstring>

using namespace std;

int i,poz[1002],phi[2000004],n,m,nr;
char a[2000004],b[2000004];

int min(int x,int y)
{
    if (x>y) return y;
    else return x;
}

void prefix()
{
    int i,k;
    phi[1]=0;
    k=0;
    for (i=2;i<=m;i++)
    {
        while(k!=0&&b[i]!=b[k+1])
            k=phi[k];
        if (b[i]==b[k+1])
            k++;
        phi[i]=k;
    }
}

void kmpp()
{
    int k,i;
    k=0;
    nr=0;
    for (i=1;i<=n;i++)
    {
        while(k!=0&&a[i]!=b[k+1])
            k=phi[k];
        if (a[i]==b[k+1])
            k++;
        if (k==m)
        {
            nr++;
            if (nr<=1000)
            {
                poz[nr]=i-k;
                k=phi[k];
            }
        }
    }
}

int main()
{
    freopen("strmatch.in","r",stdin);
    freopen("strmatch.out","w",stdout);
    gets(b+1);
    gets(a+1);
    m=strlen(b+1);
    n=strlen(a+1);
    prefix();
    kmpp();
    printf("%d\n",nr);
    for (i=1;i<=min(1000,nr);i++)
    {
        printf("%d ",poz[i]);
    }
    printf("\n");
    return 0;
}