#include <fstream>

#include <cstring>

#include <cstdlib>
using namespace std;
ifstream fin("strmatch.in");
ofstream fout("strmatch.out");
char A[2000005],B[2000005],y;
int nA,nB,i,j,fA[300],fB[300],mA,mB,xmin,z[1002],nr,ok,x,q;
int main()
{
    fin>>A>>B;
    nA=0;mA=0;
    while(A[nA]){
        x=(int)A[nA];
        fA[x]++;
        if(fA[x]==1)mA++;
        nA++;
    }
    mB=0;ok=1;nr=0;
    for(i=0;i<nA;i++){
        x=(int)B[i];
        fB[x]++;
        if(fB[x]==fA[x])mB++;
        else if(fB[x]==1+fA[x])mB--;
        if(B[i]!=A[i])ok=0;
    }

    if(ok==1){
        nr++;
        if(nr<=1000){
            z[nr]=0;
        }
    }

    for(i=nA;B[i]!=0;i++){
        q=(int)B[i-nA];
        fB[q]--;
        if(fB[q]==fA[q]-1) mB--;
        else if(fB[q]==fA[q]) mB++;
        x=(int)B[i];
        fB[x]++;
        if(fB[x]==fA[x])mB++;
        else if(fB[x]==1+fA[x])mB--;
        if(mA==mB){
            ok=1;
            for(j=0;j<nA;j++){
                if(A[j]!=B[i-nA+1+j]){
                    ok=0;break;
                }
            }
            if(ok==1 && mB==mA){
                nr++;
                if(nr<=1000){
                    z[nr]=i-nA+1;
                }
            }
        }

    }
    fout<<nr<<"\n";
    for(i=1;i<=nr && i<=1000;i++){
        fout<<z[i]<<" ";
    }
    fout.close();
    fin.close();
    return 0;

}