def word_to_number(word):
    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
    }

    parts = word.lower().split()
    number = 0

    if len(parts) == 1:
        if parts[0] in singles:
            number = singles[parts[0]]
        elif parts[0] in teens:
            number = teens[parts[0]]
        elif parts[0] in tens:
            number = tens[parts[0]]
    elif len(parts) == 2:
        if parts[0] in tens and parts[1] in singles:
            number = tens[parts[0]] + singles[parts[1]]
        elif parts[0] in singles and parts[1] in singles:
            number = singles[parts[0]]  # fall back, rare
    return number

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)

# --- Main Program ---
import sys

input_line = sys.stdin.read().strip()
parts = input_line.lower().split()

try:
    # Try to parse as numbers like "1 1"
    if len(parts) == 2 and parts[0].isdigit() and parts[1].isdigit():
        x = int(parts[0])
        y = int(parts[1])
    else:
        # Otherwise assume it's two words like "twenty three"
        if len(parts) == 2:
            x = word_to_number(parts[0])
            y = word_to_number(parts[1])
        elif len(parts) == 3:
            # e.g. "twenty one five" → 21, 5
            x = word_to_number(" ".join(parts[:2]))
            y = word_to_number(parts[2])
        elif len(parts) == 4:
            x = word_to_number(" ".join(parts[:2]))
            y = word_to_number(" ".join(parts[2:]))
        else:
            x = y = 0  # fallback
except:
    x = y = 0  # fallback

print(chess_moves(x, y))