# (a, aa)=map(float, input().split())
# A=aa-a
# (b, bb)=map(float, input().split())
# B=bb-b
# (c, cc)=map(float, input().split())
# C=cc-c
# (d, dd)=map(float, input().split())
# D=dd-d
# (e, ee)=map(float, input().split())
# E=ee-e
# M=int(0)
# K=[A, B, C, D, E]
# for x in range(0, 5):
# if 5>K[x]>1:
# M+=(K[x]*10000-10000)
# elif K[x]>=5:
# M+=40000
# else:
# M+=0
# if M/10000>=15:
# M=M*(95/100)
# elif M/10000<=5:
# M=M*(105/100)
# print(int(M))
# K=(input())
# k=list(K)
# y=0
# m=0
# d=0
# G=0
# for x in range(0,6):
# k[x]=int(k[x])
# for x in range(7,10):
# k[x]=int(k[x])
# if k[7]<=2:
# y=1900+10*k[0]+k[1]
# if k[7]==1:
# G='M'
# else:
# G='F'
# else:
# y=2000+10*k[0]+k[1]
# m=k[2]*10+k[3]
# d=k[4]*10+k[5]
# if m<10:
# if d<10:
# print(f'{y}/0{m}/0{d} {G}')
# else:
# print(f'{y}/0{m}/{d} {G}')
# else:
# if d<10:
# print(f'{y}/{m}/0{d} {G}')
# else:
# print(f'{y}/{m}/{d} {G}')
# S1=input()
# S2=input()
# S3=input()
# s1=list(S1)
# s2=list(S2)
# s3=list(S3)
# if s1[len(s1)-1]==s2[0]:
# if s2[len(s2)-1]==s3[0]:
# if s3[len(s3)-1]==s1[0]:
# print('good')
# else:
# print('bad')
# else:
# print('bad')
# else:
# print('bad')