#include<fstream>
#include<string>
#include<cmath>
using namespace std;

#define dimMAX 2000002;
#define P 73
#define MOD1 100007
#define MOD2 100021

int match[2000002];
int p1,p2;
int main(){
    string A,B;
    ifstream inFile("strmatch.in");
    getline(inFile,A);
    getline(inFile,B);
    int a,b;
    a=A.size()-1;
    b=B.size()-1;
    ofstream outFile;
    outFile.open("strmatch.out");
    long long hashA=0;
    long long hashB=0;
    for(int i=0;i<=a;i++){
        hashA=(hashA*P+A[i])%MOD1;
        hashB=(hashB*P+B[i])%MOD1;
        if(i!=0) p1=(p1*P)%MOD1;
    }
    int nr=0;
    if(hashA==hashB){
            nr++;
            match[nr]=0;
    }
 /*   for(int i=1;i<=b-a;i++){
        hashB = ((hashB - (B[i-1] * p1) % MOD1 + MOD1) * P + B[i+a]) % MOD1;
        if(hashB==hashA){
            nr++;
            match[nr]=i;
        }
    }
 */
       for(int i=a+1;i<=b;i++){
       hashB = ((hashB - (B[i - a+1] * p1) % MOD1 + MOD1) * P + B[i]) % MOD1;
        if(hashB==hashA){
            nr++;
            match[nr]=i-a+1;
        }
    }
    outFile<<nr<<"\n";
    if(nr>1000) nr=1000;
    for(int i=1;i<=nr;i++) outFile<<match[i]<<" ";

}