Problem: Snuke is introducing a robot arm with the following properties to his factory:

* The robot arm consists of m sections and m+1 joints. The sections are numbered 1, 2, ..., m, and the joints are numbered 0, 1, ..., m. Section i connects Joint i-1 and Joint i. The length of Section i is d_i.
* For each section, its mode can be specified individually. There are four modes: `L`, `R`, `D` and `U`. The mode of a section decides the direction of that section. If we consider the factory as a coordinate plane, the position of Joint i will be determined as follows (we denote its coordinates as (x_i, y_i)):
* (x_0, y_0) = (0, 0).
* If the mode of Section i is `L`, (x_{i}, y_{i}) = (x_{i-1} - d_{i}, y_{i-1}).
* If the mode of Section i is `R`, (x_{i}, y_{i}) = (x_{i-1} + d_{i}, y_{i-1}).
* If the mode of Section i is `D`, (x_{i}, y_{i}) = (x_{i-1}, y_{i-1} - d_{i}).
* If the mode of Section i is `U`, (x_{i}, y_{i}) = (x_{i-1}, y_{i-1} + d_{i}).



Snuke would like to introduce a robot arm so that the position of Joint m can be matched with all of the N points (X_1, Y_1), (X_2, Y_2), ..., (X_N, Y_N) by properly specifying the modes of the sections. Is this possible? If so, find such a robot arm and how to bring Joint m to each point (X_j, Y_j).

Constraints

* All values in input are integers.
* 1 \leq N \leq 1000
* -10^9 \leq X_i \leq 10^9
* -10^9 \leq Y_i \leq 10^9

Input

Input is given from Standard Input in the following format:


N
X_1 Y_1
X_2 Y_2
:
X_N Y_N


Output

If the condition can be satisfied, follow the following format. If the condition cannot be satisfied, print `-1`.


m
d_1 d_2 ... d_m
w_1
w_2
:
w_N


m and d_i are the configurations of the robot arm. Refer to the problem statement for what each of them means. Here, 1 \leq m \leq 40 and 1 \leq d_i \leq 10^{12} must hold. Also, m and d_i must all be integers.

w_j is a string of length m that represents the way to bring Joint m of the robot arm to point (X_j, Y_j). The i-th character of w_j should be one of the letters `L`, `R`, `D` and `U`, representing the mode of Section i.

Examples

Input

3
-1 0
0 3
2 -1


Output

2
1 2
RL
UU
DR


Input

5
0 0
1 0
2 0
3 0
4 0


Output

-1


Input

2
1 1
1 1


Output

2
1 1
RU
UR


Input

3
-7 -3
7 3
-3 -7


Output

5
3 1 4 1 5
LRDUL
RDULR
DULRD

Solution (in CPP):

Solution:
#include <iostream>
#include <cstdio>
#include <vector>
#include <cmath>

using namespace std;

typedef long long ll;

ll n;
ll x[1005], y[1005];
vector<ll> z;

int main()
{
    //freopen("input.txt", "r", stdin);
    scanf("%lld", &n);
    for(ll i = 0; i < n; i++) scanf("%lld%lld", &x[i], &y[i]);
    for(ll i = 1; i < n; i++)
    {
        if(((x[i] + y[i] - x[0] - y[0]) & 1) == 1)
        {
            printf("-1");
            return 0;
        }
    }
    if(((x[0] + y[0]) & 1) == 0)
    {
        printf("37\n");
        for(ll i = 35; i >= 0; i--) z.push_back(1ll << i), printf("%lld ", 1ll << i);
        z.push_back(1), printf("%lld ", 1);
    }
    else
    {
        printf("36\n");
        for(ll i = 35; i >= 0; i--) z.push_back(1ll << i), printf("%lld ", 1ll << i);
    }
    puts("");
    for(ll i = 0; i < n; i++)
    {
        for(ll j = 0; j < z.size(); j++)
        {
            if(abs(x[i]) < abs(y[i]))
            {
                if(y[i] > 0) printf("U"), y[i] -= z[j];
                else printf("D"), y[i] += z[j];
            }
            else
            {
                if(x[i] > 0) printf("R"), x[i] -= z[j];
                else printf("L"), x[i] += z[j];
            }
        }
        puts("");
    }
    return 0;
}