#include <cstdio>

#include <cmath>

#include <algorithm>

#include <cstring>

using namespace std;

typedef long long LL;

const int N=1048600;

int n,pos[N];

namespace FFT{

    struct comp{

        double r,i;

        comp(double _r=0,double _i=0):r(_r),i(_i){}

        comp operator +(const comp&x){return comp(r+x.r,i+x.i);}

        comp operator -(const comp&x){return comp(r-x.r,i-x.i);}

        comp operator *(const comp&x){return comp(r*x.r-i*x.i,i*x.r+r*x.i);}

        comp conj(){return comp(r,-i);}

    }A[N],B[N];

    const double pi=acos(-1.0);

    void FFT(comp a[],int n,int t){

        for(int i=1;i<n;i++)if(pos[i]>i)swap(a[i],a[pos[i]]);

        for(int d=0;(1<<d)<n;d++){

            int m=1<<d,m2=m<<1;

            double o=pi*2/m2*t;

            comp _w(cos(o),sin(o));

            for(int i=0;i<n;i+=m2){

                comp w(1,0);

                for(int j=0;j<m;j++){

                    comp& A=a[i+j+m],&B=a[i+j],t=w*A;

                    A=B-t;B=B+t;w=w*_w;

                }

            }

        }if(t==-1)for(int i=0;i<n;i++)a[i].r/=n;

    }

}

int l1,l2,ans[N],cnt=0,a[N],b[N];

FFT::comp A[N],B[N],C[N];

char s1[N],s2[N];

int main(){

    scanf("%d%d",&l1,&l2);

    scanf(" %s %s",&s1,&s2);

    for(int i=0;i<l1;i++)a[l1-1-i]=s1[i]=='*'?0:s1[i]-'a'+1;

    for(int i=0;i<l2;i++)b[i]=s2[i]=='*'?0:s2[i]-'a'+1;

    int N=1; while(N<l1+l2)N<<=1;

    int j=__builtin_ctz(N)-1;

    for(int i=0;i<N;i++){pos[i]=pos[i>>1]>>1|((i&1)<<j);}

    for(int i=0;i<N;i++)A[i]=FFT::comp(a[i]*a[i]*a[i],0),B[i]=FFT::comp(b[i],0);

    FFT::FFT(A,N,1);FFT::FFT(B,N,1);

    for(int i=0;i<N;i++)C[i]=C[i]+A[i]*B[i];

    for(int i=0;i<N;i++)A[i]=FFT::comp(a[i],0),B[i]=FFT::comp(b[i]*b[i]*b[i],0);

    FFT::FFT(A,N,1);FFT::FFT(B,N,1);

    for(int i=0;i<N;i++)C[i]=C[i]+A[i]*B[i];

    for(int i=0;i<N;i++)A[i]=FFT::comp(a[i]*a[i],0),B[i]=FFT::comp(b[i]*b[i],0);

    FFT::FFT(A,N,1);FFT::FFT(B,N,1);

    for(int i=0;i<N;i++)C[i]=C[i]-A[i]*B[i]*FFT::comp(2,0);

    FFT::FFT(C,N,-1);

    for(int i=l1-1;i<l2;i++){

        if(C[i].r<0.5)ans[cnt++]=i-l1+2;

    }printf("%d\n",cnt);if(cnt==0)return 0;

    for(int i=0;i<cnt-1;i++)printf("%d ",ans[i]);

    printf("%d\n",ans[cnt-1]);

}