/*
#include <stdio.h>
int main(){
double a,b,i;
scanf("%lf %lf",&a,&b);
for(i=a;i<=b;i+=0.01) {
printf("%0.2lf ",i);
}
return 0;
}
*/
/*
#include<stdio.h>
int main(){
int i,n;
scanf("%d",&n);
for(i=1;i<=n;i++){
printf("*");
}
return 0;
}
*/
#include<stdio.h>
int main(){
int a,b,i;
scanf("%d %d",&a,&b);
if(a%2==0) {
printf("%d",a+1);
}
for(i=a;i<=b;i+=2) {
printf("%d ",i);
}
return 0;
}