#include <bits/stdc++.h>

using namespace std;

const int MAXB = 2e6 , BZH = 67 , MODH = 1e9 + 7 , MAXI = 1e3;
int hb[MAXB + 1] , idx[MAXI + 1] , pb[MAXB + 1] , ib[MAXB + 1];
int conv ( char ch ) {
    if ( 'A' <= ch && ch <= 'Z' )
        return ch - 'A' + 1;
    else if ( 'a' <= ch && ch <= 'z' )
        return ch - 'a' + 27;
    else
        return ch - '0' + 53;
}
int mypow ( int b , int e ) {
    int rez;

    rez = 1;
    while ( e > 0 ) {
        if ( e % 2 == 1 )
            rez = ( long long ) rez * b % MODH;
        b = ( long long ) b * b % MODH;
        e = e / 2;
    }

    return rez;
}
int get ( int dr , int st ) {
    return ( hb[dr] - hb[st - 1] + MODH ) % MODH * ( long long ) ib[st - 1] % MODH;
}
void calcPb () {
    int i;

    pb[0] = 1;
    for ( i = 1 ; i <= MAXB ; i++ )
        pb[i] = ( long long ) pb[i - 1] * BZH % MODH;
    ib[MAXB] = mypow ( pb[MAXB] , MODH - 2 );
    for ( i = MAXB - 1 ; i > 0 ; i-- )
        ib[i] = ( long long ) ib[i + 1] * BZH % MODH;
}
int main () {
    ifstream fin ( "strmatch.in" );
    ofstream fout ( "strmatch.out" );
    char la , lb;
    int ha , lenb , lena , i , leni;

    calcPb ();
    fin.get ( la );
    ha = lena = 0;
    while ( la != '\n' ) {
        ha = ( ha + ( long long ) conv ( la ) * pb[lena] % MODH ) % MODH;
        lena++;
        fin.get ( la );
    }
    fin.get ( lb );
    lenb = 1;
    while ( lb != '\n' ) {
        hb[lenb] = ( hb[lenb - 1] + ( long long ) conv ( lb ) * pb[lenb - 1] % MODH ) % MODH;
        lenb++;
        fin.get ( lb );
    }
    lenb--;
    leni = 0;
    for ( i = lena ; i <= lenb ; i++ ) {
        if ( get ( i , i - lena + 1 ) == ha )
            if ( leni < MAXI )
                idx[++leni] = i - lena;
    }
    fout << leni << '\n';
    for ( i = 1 ; i <= leni ; i++ )
        fout << idx[i] << ' ';
    fout.put ( '\n' );
    return 0;
}