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 PYTHON3):

Solution:
N = int(input())

XY = []
parity = []
for _ in range(N):
    xy = list(map(int, input().split()))
    XY.append(xy)
    parity.append(sum(xy))


def check(ds, l, xy):
    x = 0
    y = 0
    for i in range(len(ds)):
        if l[i] == "R":
            x += ds[i]
        elif l[i] == "L":
            x -= ds[i]
        elif l[i] == "U":
            y += ds[i]
        elif l[i] == "D":
            y -= ds[i]
        else:
            raise Exception

    return (x == xy[0]) & (y == xy[1])


if len(list(set([i % 2 for i in parity]))) == 2:
    print(-1)

elif parity[0] % 2 == 0:
    print(33)
    ds = [1, 1] + [2 ** k for k in range(1, 32)]
    print(*ds)
    for xy in XY:
        rev_ans = ""
        curr_x, curr_y = 0, 0
        for d in ds[::-1]:
            x_diff = xy[0] - curr_x
            y_diff = xy[1] - curr_y
            if abs(x_diff) >= abs(y_diff):
                if x_diff >= 0:
                    rev_ans += "R"
                    curr_x += d
                else:
                    rev_ans += "L"
                    curr_x -= d
            else:
                if y_diff >= 0:
                    rev_ans += "U"
                    curr_y += d
                else:
                    rev_ans += "D"
                    curr_y -= d

        print(rev_ans[::-1])
        # print(check(ds, list(rev_ans[::-1]), xy))


else:  # odd
    print(32)
    ds = [2 ** k for k in range(32)]
    print(*ds)
    for xy in XY:
        rev_ans = ""
        curr_x, curr_y = 0, 0
        for d in ds[::-1]:
            x_diff = xy[0] - curr_x
            y_diff = xy[1] - curr_y
            if abs(x_diff) >= abs(y_diff):
                if x_diff >= 0:
                    rev_ans += "R"
                    curr_x += d
                else:
                    rev_ans += "L"
                    curr_x -= d
            else:
                if y_diff >= 0:
                    rev_ans += "U"
                    curr_y += d
                else:
                    rev_ans += "D"
                    curr_y -= d

        print(rev_ans[::-1])
        # print(check(ds, list(rev_ans[::-1]), xy))