const row = require('fs').readFileSync('/dev/stdin','utf8').split('\n');
const column = row[0].split(' ');
const a = Number(column[0]);
const b = Number(column[1]);

for(let i=a;i<=b; i++) {
    if(i%3===0 || /3/.test(i)){
        console.log(i);
    }
}