import ply.lex as lex

tokens = (
    'INTEGER',
    'FLOAT',
    'ADD_OP',
    'MUL_OP',
    'BRACKET',
)

def t_BRACKET(t):
    r'\(|\)'
    if t.value == '(':
        t.value = "L"
    else:
        t.value = "R"
    return t

def t_MUL_OP(t):
    r'\*|/'
    return t


def t_ADD_OP(t):
    r'\+|-'
    return t


def t_FLOAT(t):
    r'\d+\.\d*'
    t.value = float(t.value)
    return t

def t_INTEGER(t):
    r'\d+'
    t.value = int(t.value)
    return t


def t_newline(t):
    r'\n+'
    t.lexer.lineno += len(t.value)


t_ignore = ' |\t'


def t_error(t):
    print("Illegalcharacter '%s'" %t.value[0])
    t.lexer.skip(1)


if __name__ == "__main__":
    import sys
    lexer = lex.lex()
    lexer.input(sys.stdin.read())
    lb = 0
    for token in lexer:
        if token.type == "BRACKET":
            if token.value == "L":
                lb += 1
            else:
                lb -= 1
            if lb < 0:
                print("BRACKET missing")

        print("line %d : %s (%s) " % (token.lineno, token.type, token.value))
    if lb != 0:
        print("BRACKET missing")