#include<stdio.h>
#include<string.h>
#include<vector>
#include<algorithm>
using namespace std ;
long sol [ 1007 ] ;
char a [ 2000007 ] , b [ 2000007 ] ;
long n , m , x ;
long p [ 2000007 ] ;
void fa_x ( char b [ ] ,long i )
{
    while ( x > 0 && a [ x + 1 ] != b [ i ] )
        x = p [ x ] ;
    if ( a [ x + 1 ] == b [ i ] )
            ++ x ;
}
void make_prefix ( )
{
    for ( long i = 2 ; i <= m ; ++ i )
    {
        fa_x ( a , i ) ;
        p [ i ] = x ;
    }
}
int main()
{
    long nr2 = 0  ;
    freopen ( "strmatch.in" , "r" , stdin ) ;
    freopen ( "strmatch.out" , "w" , stdout ) ;
    a [ 0 ] = ' ' ;
    gets ( a + 1 ) ;
    b [ 0 ] = ' ' ;
    gets ( b + 1 ) ;
    m = strlen ( a ) - 1 ;
    n = strlen ( b ) - 1 ;
    make_prefix ( ) ;
    x = 0 ;
    long ok = 0 ;
    for( long i = 1 ; i <= n && ok == 0  ; ++ i )
    {
        fa_x ( b , i ) ;
        if ( x == m )
        {
            x = p [ m ] ;
            if ( sol [ 0 ] < 1000 )
                sol [ ++ sol [ 0 ] ] = i - m ;
            if ( sol [ 0 ] == 1000 )
                ok = 1 ;
        }
    }
    printf ( "%ld\n" , sol [ 0 ] ) ;
    for( long i = 1 ; i <= sol [ 0 ] ; ++ i )
        printf ( "%ld ", sol [ i ] ) ;
    return 0 ;
}