year=int(input())
month=int(input())
if (year%4==0and year%100!=0) or (year%400==0and year%100==0):
    if month==2:
        print("29")
    if month==1 or month==3 or month==5 or month==7 or month==8 or month==10 or month==12:
        print("31")
    if month==4 or month==6 or month==9 or month==11:
        print("30")
else:
    if month==2:
        print("28")
    if month==1 or month==3 or month==5 or month==7 or month==8 or month==10 or month==12:
        print("31")
    if month==4 or month==6 or month==9 or month==11:
        print("30")

from PIL import Image
img = Image.open("xzt.jpg")  
pix = img.load()
def ju(R,G,B):
    gray=0.299*R+0.587*G+0.114*B
    if gray<132:
        return "黑色"
    else:
        return "白色"
def pd(x,y):
    ans=0
    anss=0
    for i in range(x,x+33):
        for j in range(y,y+12):
            R,G,B=pix[i,j]
            if ju(R,G,B)=="黑色":
                ans=ans+1
            anss=anss+1
    if ans/anss>=0.64:
        return "yes"
    else:
        return "no"
yy=1
dic={1:"A",2:"B",3:"C",4:"D"}
for j in range(80,180,45):        
    for k in range(0,4):
        for i in range(83+k*312,1250,60):
            if pd(i,j)=="yes":
                print(dic[yy],end=" ")
                yy=1
                break
            yy=yy+1
    yy=1
    

a=int(input())
b=int(input())
c=[0,31,28,31,30,31,30,31,31,30,31,30,31]
if a%400==0 or a%100!=0 and a%4==0:
    if b==2:
        print(29)
else:
    print(c[b])

# 得到年份和月份 
year = int(input())
month = int(input())

# 判断是不是闰年
run_year = False
if year % 100 == 0:
    if year % 400 ==0:
        run_year = True
elif year % 4 == 0:
    run_year = True
    
# 得到天数和月份的关系    
day = [31,28,31,30,31,30,31,31,30,31,30,31]
if run_year == True:
    day[1] = 29
print(day[month-1])