import os
import sys

def eq(a, b):
    return a == b

def lt(a, b):
    return a[0] < b[0]

def addstringchar(a, b):
    return a + b[0]

def emit(string):
    sys.stdout.write(string)

def trace(header, value):
    if os.environ.get('TRACE'):
        sys.stderr.write(f'{header}={value!r}\\n')

eof = chr(0)
eol = chr(10)
quote = chr(34)
PEEK = None
LINE = 1

def peek():
    global PEEK
    if PEEK is None:
        char = sys.stdin.read(1)
        trace('char', char)
        if not char:
            PEEK = eof
        else:
            PEEK = char
    return PEEK

def skip():
    global LINE
    global PEEK
    if eol == PEEK:
        LINE += 1
    PEEK = None

def skipchar(char):
    global LINE
    assert char == peek(), (LINE, char, peek())
    skip()

def fileget(path):
    with open(f'./{path}', encoding='ASCII') as fil:
        return fil.read()