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import math
def intersection(l1, l2):
return [value for value in l2 if value in l1]
def man_dist(point):
return abs(point[0]) + abs(point[1])
wire1 = {}
wire2 = {}
# wire {(x,y) : dist}
for wire in (wire1, wire2):
x = 0
y = 0
dx = 0
dy = 0
steps = 0
for move in input().split(","):
if move[0] == "D":
dx = 0
dy = -1
elif move[0] == "U":
dx = 0
dy = 1
elif move[0] == "R":
dx = 1
dy = 0
elif move[0] == "L":
dx = -1
dy = 0
for i in range(int(move[1:])):
x += dx
y += dy
steps += 1
wire[(x, y)] = steps
points = intersection(list(wire1.keys()), list(wire2.keys()))
length = wire1[points[0]] + wire2[points[0]]
for point in points[1:]:
length = min(length, wire1[point] + wire2[point])
print(length)
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