# include <fstream>
using namespace std;
ifstream f("strmatch.in");
ofstream g("strmatch.out");
char a[2000001], b[2000001];
int v[1001];
int main()
{
    int i=0, la=0, ha1=0, ha2=0, hb1=0, hb2=0, d=0, index=0;
    int M1=100129, M2=99923, put1=1, put2=1;
    f>>a>>b;
    for (i=0; a[i]; i++)
    {
        ha1=(ha1*257+a[i])%M1;
        ha2=(ha2*257+a[i])%M2;
        hb1=(hb1*257+b[i])%M1;
        hb2=(hb2*257+b[i])%M2;
        la++;
        put1=(put1*257)%M1;
        put2=(put2*257)%M2;
    }
    if (ha1==hb1 && ha2==hb2)
    {
        d++;
        v[++index]=0;
    }
    for (i=la; b[i]; i++)
    {
        hb1=((hb1*257+b[i])%M1 - (b[i-la]*put1)%M1 + M1)%M1;
        hb2=((hb2*257+b[i])%M2 - (b[i-la]*put2)%M2 + M2)%M2;
        if (hb1==ha1 && hb2==ha2)
        {
            d++;
            if (d<=1000)
                v[++index]=i-la+1;
        }
    }

    g<<d<<'\n';
    for (i=1; i<=index && i<=1000; i++)
        g<<v[i]<<' ';

    return 0;
}