from lib import *

data = open(0).read()
part_1 = False

if part_1:
    r1 = re.compile(r"\\x[0-9a-f][0-9a-f]")
    r2 = re.compile(r"\\\\")
    r3 = re.compile(r"\\\"")

    enc, mem = 0, 0
    for line in data.splitlines():
        mem += len(line)
        line = r1.sub("^", line)
        line = r2.sub("^", line)
        line = r3.sub("^", line)
        enc += len(line) - 2
    print(mem - enc)
else:
    ori, enc = 0, 0
    for line in data.splitlines():
        ori += len(line)
        line = line.replace("\\", "\\\\")
        line = line.replace("\"", "\\\"")
        enc += len(line) + 2
    print(enc - ori)