import sys
from lib import *

data = open(0).read().strip()
first = False

bots = {}
outputs = {}
while True:
    if not first and 0 in outputs and 1 in outputs and 2 in outputs:
        print(outputs[0] * outputs[1] * outputs[2])
        sys.exit(0)
    for line in data.splitlines():
        ints = str_to_ints(line)
        if len(ints) == 2:
            val, bot = ints
            if bot in bots:
                if val not in bots[bot]:
                    bots[bot].append(val)
            else:
                bots[bot] = [val]
        elif len(ints) == 3:
            bot, lobot, hibot = ints
            if bot in bots and len(bots[bot]) == 2:
                loval = min(bots[bot])
                hival = max(bots[bot])
                bots[bot] = []
                if first and loval == 17 and hival == 61:
                    print(bot)
                    sys.exit(0)
                if "low to bot" in line:
                    if lobot in bots:
                        if loval not in bots[lobot]:
                            bots[lobot].append(loval)
                    else:
                        bots[lobot] = [loval]
                if "high to bot" in line:
                    if hibot in bots:
                        if hival not in bots[hibot]:
                            bots[hibot].append(hival)
                    else:
                        bots[hibot] = [hival]
                if "low to output" in line:
                    outputs[lobot] = loval
                if "high to output" in line:
                    outputs[hibot] = hival
        else:
            assert False