#!/usr/bin/ python3.8
import sys
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines

A, B = map(int, readline().split())
S = readline().rstrip().decode()
wall = set()
path = set()
path.add((A, B))

H = A
W = B

for s in S:
    if s == 'R':
        if (A, B + 1) not in path:
            wall.add((A, B + 1))
        else:
            B += 1
    elif s == 'L':
        if (A, B - 1) in wall or B == 0:
            continue
        B -= 1
        path.add((A, B))
    elif s == 'U':
        if (A - 1, B) in wall or A == 0:
            continue
        A -= 1
        path.add((A, B))
    elif s == 'D':
        if (A + 1, B) not in path:
            wall.add((A + 1, B))


if (A,B) != (0, 0):
    print(-1)
    exit()

wall = [(x, y) for x, y in wall if 0 <= x <= H and 0 <= y <= W]
print(len(wall))
for x, y in wall:
    print(x, y)