#!/bin/python3

import re
import sys
from pprint import pprint 
from collections import Counter
import numpy as np

input_f  = sys.argv[1]

def pp(x):
    for i in x:
        for j in i:
            print(j)
        print()

d, *maps = open(input_f).read().split('\n')

d = list(d)

s = []
l = []
r = []

maps = maps

nmaps = []

for i in maps:
    if i == '':
        continue
    s = i[:3]
    l = i[7:10]
    r = i[12:15]
    nmaps.append([s,l,r])


#pprint(d)
#pprint(maps)
#pprint(nmaps)

count = 0 
way = 'AAA'
first = True
found = False
index = 0
#print('Starting with ' + way)
cycle = 0
while found == False:
    cycle += 1
    for idx, i in enumerate(d):    
        #print(way)
        #print('Finding Index for ' + way,end=' at ')
        c = way
        #if first == False:
        index = [(i,table.index(c)) for i, table in enumerate(nmaps) if c in table]
        #print(index,end='')
        for j in index:
            if list(j)[1] == 0:
                index = list(j)[0]
        #index = list(index[0])[1]
        #print(' (true index ',end='')
        #print(index,end=') ')
        #else:
        #    first = False
        if i == 'R':  
            way = nmaps[index][2]
            #print('Going R to ' + way) 
        if i == 'L':  
            way = nmaps[index][1]
            #print('Going L to ' + way)
        count += 1
        if way == 'ZZZ':
            found = True
            #print('COUND')
            continue
        #if nmaps[index][1] == 'ZZZ' or nmaps[index][2] == 'ZZZ':
        #    print(nmaps[index][1],nmaps[index][2])
        #    print('Found at ' + str(index) + ' with count ' + str(count))
        #    found = True
        #    continue
print('Result: ' + str(count))