CF120A.Elevator

A sky scraper with 1000 floors has been built in the city of N. It has modern superfast elevators to help to travel from one floor to another. Each elevator has two doors, the front one and the back one. If one goes in through the front door, he goes out through the back one and vice versa. The elevator has two rails numbered with numbers 1 and 2. Rail 1 is located to the left of the entrance to the front door (or correspondingly, to the right of the entrance to the back door). Rail 2 is located opposite it, to the right of the entrance to the front door and to the left of the entrance to the back door. We know that each person in the city of N holds at a rail with the strongest hand.

One day a VIP person visited the city and of course, he took a look at the skyscraper and took a ride in the elevator. We know the door through which he entered and the rail he was holding at. Now we need to determine as soon as possible whether he is left-handed or right-handed.

一座拥有1000层的摩天大楼在N市建成。大楼配备了现代化的超高速电梯，以方便人们在各楼层之间通行。每部电梯有两个门：前门和后门。若某人从前门进入，则必从后门走出，反之亦然。电梯配有两条扶手，编号分别为1号和2号。1号扶手位于前门入口的左侧（相应地，位于后门入口的右侧）；2号扶手则正对1号扶手，位于前门入口的右侧、后门入口的左侧。已知N市的每个人均用自己最强壮的手握住扶手。

某日，一位VIP人士访问了该市，自然参观了这座摩天大楼并乘坐了电梯。我们已知他进入电梯时所使用的门（前门或后门），以及他所握住的扶手编号（1号或2号）。现在我们需要尽快判断：该VIP人士是左撇子还是右撇子。

The first line indicates the door through which the very important person entered the elevator. It contains "front" if the person enters the elevator through the front door and "back" if he entered the elevator through the back door. The second line contains integer a (1 ≤ a ≤ 2) which denotes the number of the rail at which the person was holding.

第一行表示这位非常重要的人物进入电梯的门。若此人从前门进入电梯，则该行为“front”；若此人从后门进入电梯，则该行为“back”。第二行包含一个整数 $a$（$1 ≤ a ≤ 2$），表示此人所握扶手的编号。

Print character "R" if the VIP is right-handed or "L" if he is left-handed.

如果该VIP是右撇子，则输出字符“R”；如果是左撇子，则输出字符“L”。