Virtual contest is a way to take part in past contest, as close as possible to participation on time. It is supported only ICPC mode for virtual contests.
If you've seen these problems, a virtual contest is not for you - solve these problems in the archive.
If you just want to solve some problem from a contest, a virtual contest is not for you - solve this problem in the archive.
Never use someone else's code, read the tutorials or communicate with other person during a virtual contest.

No tag edit access

E. Neatness

time limit per test

2 secondsmemory limit per test

256 megabytesinput

standard inputoutput

standard outputSimon loves neatness. So before he goes to bed, Simon wants to complete all chores in the house.

Simon's house looks like a rectangular table consisting of *n* rows and *n* columns from above. All rows of the table are numbered from 1 to *n* from top to bottom. All columns of the table are numbered from 1 to *n* from left to right. Each cell of the table is a room. Pair (*x*, *y*) denotes the room, located at the intersection of the *x*-th row and the *y*-th column. For each room we know if the light is on or not there.

Initially Simon is in room (*x*_{0}, *y*_{0}). He wants to turn off the lights in all the rooms in the house, and then return to room (*x*_{0}, *y*_{0}). Suppose that at the current moment Simon is in the room (*x*, *y*). To reach the desired result, he can perform the following steps:

- The format of the action is "1". The action is to turn on the light in room (
*x*,*y*). Simon cannot do it if the room already has light on. - The format of the action is "2". The action is to turn off the light in room (
*x*,*y*). Simon cannot do it if the room already has light off. - The format of the action is "dir" (
*dir*is a character). The action is to move to a side-adjacent room in direction*dir*. The direction can be left, right, up or down (the corresponding dir is L, R, U or D). Additionally, Simon can move only if he see a light in the direction*dir*. More formally, if we represent the room, Simon wants to go, as (*nx*,*ny*), there shold be an integer*k*(*k*> 0), that room (*x*+ (*nx*-*x*)*k*,*y*+ (*ny*-*y*)*k*) has a light. Of course, Simon cannot move out of his house.

Help Simon, find the sequence of actions that lets him achieve the desired result.

Input

The first line contains three positive integers *n*, *x*_{0}, *y*_{0} (2 ≤ *n* ≤ 500, 1 ≤ *x*_{0}, *y*_{0} ≤ *n*).

Next *n* lines contain the description of rooms in the house. The *i*-th line contains *n* space-separated integers *a*_{i1}, *a*_{i2}, ..., *a*_{in}. If number *a*_{ij} equals zero, then room (*i*, *j*) has light off, and if number *a*_{ij} equals one, then room (*i*, *j*) has light on. It is guaranteed that at least one room has light on.

Output

If there is no desired sequence of actions, print "NO" (without the quotes). Otherwise, print "YES" (without the quotes) and the description of the required sequence of actions as a string. Note that you do not have to minimize the length of the sequence of actions but you shouldn't use more than 3·10^{6} actions.

Examples

Input

3 1 1

1 0 0

0 1 0

1 0 0

Output

YES

D1R2L2D2UU2

Input

3 1 1

1 0 0

0 1 0

0 0 1

Output

NO

Codeforces (c) Copyright 2010-2020 Mike Mirzayanov

The only programming contests Web 2.0 platform

Server time: Sep/20/2020 04:42:49 (i1).

Desktop version, switch to mobile version.

Supported by

User lists

Name |
---|