#include<cstdio>
#include<iostream>
#include<cstring>
#include<cstdlib>
#include<algorithm>
#include<cmath>
using namespace std;
const double pi=acos(-1.0);struct complex
{double r,i;complex(){}complex(double R,double I){r=R,i=I;}friend complex operator +(complex x,complex y){return complex(x.r+y.r,x.i+y.i);}friend complex operator -(complex x,complex y){return complex(x.r-y.r,x.i-y.i);}friend complex operator *(complex x,complex y){return complex(x.r*y.r-x.i*y.i,x.r*y.i+x.i*y.r);}
}A[410000],B[410000],C[410000]; int Re[410000];
void fft(complex *a,int n,int op)
{for(int i=0;i<n;i++)if(i<Re[i])swap(a[i],a[Re[i]]);for(int i=1;i<n;i<<=1){complex wn(cos(pi/i),sin(op*pi/i));for(int j=0;j<n;j+=(i<<1)){complex w(1,0);for(int k=0;k<i;k++,w=w*wn){complex t1=a[j+k],t2=a[j+k+i]*w;a[j+k]=t1+t2;a[j+k+i]=t1-t2;}}}
}char ss[410000];
int s1len,s1[410000],s2len,s2[410000],f[410000];
int aslen,as[410000];
int main()
{scanf("%s",ss);s1len=strlen(ss);for(int i=0;i<s1len;i++)if('a'<=ss[i]&&ss[i]<='z')s1[i]=ss[i]-'a'+1;else s1[i]=0;scanf("%s",ss);s2len=strlen(ss);for(int i=0;i<s2len;i++)if('a'<=ss[i]&&ss[i]<='z')s2[s2len-1-i]=ss[i]-'a'+1;else s2[s2len-1-i]=0;//~~~~~~~~~~~~~~~~~~~~read~~~~~~~~~~~~~~~~~~~~~~~~~~~    int n,m=s1len+s2len-2,L=0;for(n=1;n<=m;n*=2)L++;for(int i=1;i<=n;i++)Re[i]=(Re[i>>1]>>1)|((i&1)<<(L-1));memset(f,0,sizeof(f));//~~~~~~~~~~~~~~~~~~~~~init~~~~~~~~~~~~~~~~~~~~~~~~~~for(int i=0;i<=n;i++)A[i].r=s2[i]*s2[i]*s2[i],B[i].r=1;fft(A,n,1),fft(B,n,1);for(int i=0;i<n;i++)C[i]=A[i]*B[i];fft(C,n,-1);for(int i=s2len-1;i<s1len;i++)f[i]+=int(C[i].r/n+0.5);memset(A,0,sizeof(A));memset(B,0,sizeof(B));for(int i=0;i<=n;i++)A[i].r=2*s2[i]*s2[i],B[i].r=s1[i];fft(A,n,1),fft(B,n,1);for(int i=0;i<n;i++)C[i]=A[i]*B[i];fft(C,n,-1);for(int i=s2len-1;i<s1len;i++)f[i]-=int(C[i].r/n+0.5);memset(A,0,sizeof(A));memset(B,0,sizeof(B));for(int i=0;i<=n;i++)A[i].r=s2[i],B[i].r=s1[i]*s1[i];fft(A,n,1),fft(B,n,1);for(int i=0;i<n;i++)C[i]=A[i]*B[i];fft(C,n,-1);for(int i=s2len-1;i<s1len;i++)f[i]+=int(C[i].r/n+0.5);aslen=0;for(int i=s2len-1;i<s1len;i++)if(f[i]==0)as[++aslen]=i-s2len+1;printf("%d\n",aslen);for(int i=1;i<=aslen;i++)printf("%d\n",as[i]);return 0;
}