var A,B,S;

function Main(input){
    A = parseInt(inputArr[0]);
    B = parseInt(inputArr[1]);
    for(var i = A; i<= B; i++){
	if(i%3 = 0) console.log(i);
	else{
	    S = i.toString();
	    if(S[i] == '3'){
		console.log(i);
		return;
	    } 
	}
    }
}

Main(require("fs").readFileSync("/dev/stdin", "utf8"));