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#include <fstream>
#include <cstring>
using namespace std;
ifstream f("strmatch.in");
ofstream g("strmatch.out");
char a[2000005],b[2000005];
int i,j,n,m,PI[2000005],k,sol[2000005];
int main()
{
f>>b+1>>a+1;
n=strlen(a+1);
m=strlen(b+1);
i=2;
j=1;
while(i<=m)
{
if(b[i]==b[j])
{
PI[i]=j;
j++;
}
else j=1;
i++;
}
i=1;
j=0;
while(i<=n)
{
while(a[i]!=b[j+1]&&j!=0)
j=PI[j];
if(a[i]==b[j+1])
j++;
if(j==m)
sol[++k]=i-m;
i++;
}
g<<k<<'\n';
for(i=1;i<=min(k,1000);i++)
g<<sol[i]<<' ';
return 0;
}