# a,b=map(int,input().split())
# if a==0 and b<30:
# print(23,b+60-30)
# elif b<30:
# print(a-1,b+60-30)
# else:
# print(a,b-30)
# a=int(input())
# b=(a%10*10+a//10)*2
# c=b-100*(b//100)
# if b>100:
# print(c)
# else:
# print(b)
# if c<=50:
# print('GOOD')
# elif c>50:
# print('OH MY GOD')
# a=int(input())
# if a<0:
# print('음수')
# elif a>0:
# print('양수')
# else:
# print('0')
# a=int(input())
# if a>=90:
# print('A')
# elif a>=80:
# print('B')
# elif a>=70:
# print('C')
# elif a>=60:
# print('D')
# else:
# print('F')
# a=int(input())
# if a<=10:
# print('정상')
# elif a<=20:
# print('과체중')
# else:
# print('비만')
# a=int(input())
# if a%10==1 and a//10!=1:
# print(a,'st',sep='')
# elif a%10==2 and a//10!=1:
# print(a,'nd',sep='')
# elif a%10==3 and a//10!=1:
# print(a,'rd',sep='')
# else:
# print(a,'th',sep='')
# a,b=map(float,input().split())
# if a==-1 or b==-1 or a==-1 and b==-1:
# print('%.6f'%(if a==-1 and b==-1 else a*b,b-a if b==-1 else a-b))
# else:
# print('%.6f'%(a+b if a==1 or b==1 else b**a))
# a, b = map(int, input().split())
# x = [a+b, b+a, a-b, b-a, a*b, b*a, a/b, b/a, a**b, b**a]
# # print('%.6f'%(max(x)))
# a,b=map(int,input().split())
# if a%b==0:
# print(b,'*',a//b,'=',a,sep='')
# elif b%a==0:
# print(a,'*',b//a,'=',b,sep='')
# else:
# print('none')
# a,b,c,d=map(int,input().split())
# x=a+b+c+d
# if x==1 or x==2:
# print('도' if x==1 else '개')
# elif x==3 or x==4:
# print('걸' if x==3 else '윷')
# else:
# print('모')
# a,b=map(int,input().split())
# x=[400,340,170,100,70]
# print('angry'if x[a-1]+x[b-1]>500 else'no angry')
# a,b,c=map(int,input().split())
# x=[a,b,c]
# print('yes'if max(x)<a+b+c-max(x)-min(x)+min(x) else 'no')
# data = list(map(int, input().split()))
# data.sort()
# # print('yes' if data[0] + data[1] > data[2] else 'no')
# a,b=map(int,input().split())
# if b==1 or b==3 or b==5 or b==7 or b==8 or b==10 or b==12:
# print('31')
# elif b==4 or b==6 or b==9 or b==11:
# print('30')
# else:
# print('29'if a%4==0 and a%100!=0 or a%400==0 else '28')