def word_to_number(words):
    singles = {
        "zero": 0, "one": 1, "two": 2, "three": 3,
        "four": 4, "five": 5, "six": 6, "seven": 7,
        "eight": 8, "nine": 9
    }

    teens = {
        "ten": 10, "eleven": 11, "twelve": 12, "thirteen": 13,
        "fourteen": 14, "fifteen": 15, "sixteen": 16,
        "seventeen": 17, "eighteen": 18, "nineteen": 19
    }

    tens = {
        "twenty": 20, "thirty": 30, "forty": 40,
        "fifty": 50, "sixty": 60, "seventy": 70,
        "eighty": 80, "ninety": 90
    }

    words = words.strip().lower().split()
    result = 0
    i = 0

    while i < len(words):
        if words[i] in teens:
            result += teens[words[i]]
            i += 1
        elif words[i] in tens:
            result += tens[words[i]]
            if i + 1 < len(words) and words[i + 1] in singles:
                result += singles[words[i + 1]]
                i += 2
            else:
                i += 1
        elif words[i] in singles:
            result += singles[words[i]]
            i += 1
        else:
            i += 1
    return result

def chess_moves(x, y):
    if x == 0 and y == 0:
        return 0
    rook = 1 if x == 0 or y == 0 else 2
    if (x + y) % 2 != 0:
        bishop = float('inf')
    elif x == y or x == -y:
        bishop = 1
    else:
        bishop = 2
    return min(rook, bishop)

# ---- Input Handler ----
import sys
input_line = sys.stdin.read().strip().lower()

tokens = input_line.split()

if all(token.isdigit() for token in tokens):
    # Numeric input
    x, y = map(int, tokens)
else:
    # Word input
    # Strategy: split the input into two word groups (first for x, second for y)
    # e.g., "twenty one five" → ["twenty one", "five"]
    # e.g., "forty four" → ["forty", "four"]
    found = False
    for i in range(1, len(tokens)):
        x_words = " ".join(tokens[:i])
        y_words = " ".join(tokens[i:])
        x = word_to_number(x_words)
        y = word_to_number(y_words)
        if isinstance(x, int) and isinstance(y, int):
            found = True
            break
    if not found:
        x = y = 0  # fallback

print(chess_moves(x, y))