'''
@Author: your name
@Date: 2020-07-12 21:20:43
@LastEditTime: 2020-07-12 22:36:06
@LastEditors: Please set LastEditors
@Description: In User Settings Edit
@FilePath: \vscode_py\day7.py
'''
# Question20:
# 生成一个类，里面包含一个迭代器，打印0~n中能被7整除的数

class Q20():
    def by_seven(self, n):
        for number in range(1,n + 1):
            if number % 7 == 0: yield number


# Question21:
# 通过命令行输入机器人移动方向和位移，输出最终位置到原点的距离
import math

def Q21():
    pose=[0,0]
    while True:
        dir=input().split()
        if not dir:
            break
        if dir[0] == 'UP':
            pose[1]+=int(dir[1])
        elif dir[0] == 'DOWN':
            pose[1]-=int(dir[1])
        elif dir[0] == 'LEFT':
            pose[0]-=int(dir[1])
        elif dir[0] == 'RIGHT':
            pose[0]+=int(dir[1])
        else:
            pass
    distance=round(math.sqrt(pose[0]*pose[0]+pose[1]**2))
    print(distance)


        
if __name__ == "__main__":

    # divisible =Q20()
    # generator=divisible.by_seven(int(input()))
    # for number in generator:
    #     print(number)

    Q21()