#include <stdio.h>
int P(int n){ if(n<2)return 0; for(int i=2;i*i<=n;i++) if(n%i==0)return 0; return 1; }
int main(){
int a,b;
for(int i
=a
;i
<=b
;i
++) if(P
(i
)) printf("%d ",i
); }
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