def main():
    essay_date()

def essay_date():
    x = input()
    x = x.split()
    a = int(x[0])
    b = int(x[1])
    c = int(x[2])
    d = int(x[3])
    date = 31 - a + b
    if date >= c:
        print('1')
    elif date >= d and date < c:
        print('2')
    else:
        print('3')

if __name__ == '__main__':
    main()