

Input

The input consists of a single string of uppercase letters A-Z. The length of the string is between 1 and 10 characters, inclusive.

Output

Output "YES" or "NO".

Examples

Input


NEAT


Output


YES


Input


WORD


Output


NO


Input


CODER


Output


NO


Input


APRILFOOL


Output


NO


Input


AI


Output


YES


Input


JUROR


Output


YES


Input


YES


Output


NO
"""for p in range(int(input())):

	n,k=map(int,input().split(" "))
	number=input().split(" ")
	chances=[k for i in range(n)]

	prev=-1
	prev_updated=-1
	last_used=False
	toSub=0
	start=0

	prevSub=0

	if(number[0]=='1'):
		prev=0
		prev_updated=0
		start=1

	for i in range(start,n):
		
		if(number[i]=='1'):
		#	print("\ni",i,"\ntoSub",toSub,"\nprevUpadted",prev_updated,"\nprev",prev,"\nlast_used",last_used)
			f1=False
#			toSub+=1
			toSub=0

			zeros=i - prev_updated - 1

			if(last_used):
				zeros-=1

			#chances[i]-=toSub

			#print(prevSub,(i - prev - 1 ) +1)
			if(i - prev - 1 <= prevSub):
				chances[i]-= prevSub - (i - prev - 1 ) +1
				if(chances[i]<zeros):
					chances[i]=zeros
				toSub+= prevSub - (i - prev - 1 ) +1
				f1=True

			if(zeros==0 or chances[i]==0):
				prev_updated=i
				prev=i
				last_used=False
				prevSub=toSub
				continue
		#	print("\nchances:  ",chances[i],"\t\tzeroes :   ",zeros,"\t\tprevSub :",prevSub)

			if(chances[i]>zeros):
		#		print("\t\t\t\t1")
				number[i-zeros]='1'
				number[i]='0'
				prev_updated=i-zeros
				last_used=False
			elif(chances[i]==zeros):
		#		print("\t\t\t\t2")
				number[i]='0'
				number[i-chances[i]]='1'
				prev_updated=i-chances[i]
				last_used=True
			else:
		#		print("\t\t\t\t3")
				number[i]='0'
				number[i-chances[i]]='1'
				prev_updated=i-chances[i]
				last_used=True
			prev=i

			prevSub=toSub

			if(prev_updated>2 and f1):
				if(number[prev_updated]=='1' and number[prev_updated-1]=='0' and number[prev_updated-2]=='1'):
					last_used=False
				#if()

		#	print("\ni",i,"\ntoSub",toSub,"\nprevUpadted",prev_updated,"\nprev",prev,"\nlast_used",last_used)
		#	print(number)
		else:
			toSub=0

	print(*number)
#	print(chances)"""

"""class offer:
	def __init__(self, n, fre):
		self.num = n
		self.free = fre
		self.delta= n-fre
		

n,m,k=map(int,input().split(" "))

shovel=list(map(int,input().split(" ")))

#dicti={}

offers=[]
temp_arr=[False for i in range(n)]

for i in range(m):
	p,q=map(int,input().split(" "))
	if(p>k):
		continue
	offers.append(offer(p,q))
#	dicti[p]=q

#for i in dicti:
#	dicti[i].sort()	

shovel.sort()
shovel=shovel[:k+1]

offers.sort(key=lambda x: x.delta/x.num,reverse=True)

bestoffer=[]

for i in offers:
	if(not temp_arr[i.num]):
		temp_arr[i.num]=True
		bestoffer.append(i)

cost=0

for i in bestoffer:
	
	
for p in range(int(input())):
	arr=list(input())

	n=len(arr)
	for i in range(n):
		arr[i]=ord(arr[i])-96

	arr.sort()

	arr1=arr[:n//2]
	arr2=arr[n//2:]
	arr=[]
	#print(arr,arr1,arr2)
	i1=n//2-1
	i2=n-i1-2

	while (i1!=-1 and i2!=-1):
		arr.append(arr1[i1])
		arr.append(arr2[i2])
		i1-=1
		i2-=1
	if(i1!=-1):
		arr.append(arr1[i1])
	elif(i2!=-1):
		arr.append(arr2[i2])

	#print(arr)

	s=""
	for i in range(n-1):
		if(abs(arr[i]-arr[i+1])==1):
			s=-1
			print("No answer")
			break
		else:
			s+=chr(arr[i]+96)

	if(s!=-1):
		s+=chr(arr[-1]+96)
		print(s)"""

"""
n,m=map(int,input().split(" "))

seti=[]
ans=[1 for i in range(n)]


for i in range(m):
	arr=list(map(int,input().split(" ")))
	
	if(arr[0]>1):
		seti.append(set(arr[1:]))
	else:
		m-=1

parent=[-1 for i in range(m)]
#print(seti)
for i in range(m-1):
	for j in range(i+1,m):
		if(parent[j]==-1):
			if(len(seti[i].intersection(seti[j]))>0):
				seti[i]=seti[i].union(seti[j])
				parent[j]=i

#print(parent)

for i in range(m):
	if(parent[i]==-1):
		temp=list(seti[i])
		store=len(temp)
		for j in temp:
			ans[j-1]=store

print(*ans)


for p in range(int(input())):
	arr=list(input())

	n=len(arr)
	for i in range(n):
		arr[i]=ord(arr[i])-96

	arr.sort()

	arr1=arr[:n//2]
	arr2=arr[n//2:]
	arr=[]
	#print(arr,arr1,arr2)
	i1=n//2-1
	i2=n-i1-2

	while (i1!=-1 and i2!=-1):
		arr.append(arr1[i1])
		arr.append(arr2[i2])
		i1-=1
		i2-=1
	if(i1!=-1):
		arr.append(arr1[i1])
	elif(i2!=-1):
		arr.append(arr2[i2])

	s=""
	for i in range(n-1):
		if(abs(arr[i]-arr[i+1])==1):
			s=-1
			print("No answer")
			break
		else:
			s+=chr(arr[i]+96)

	if(s!=-1):
		s+=chr(arr[-1]+96)
		print(s)"""
#n=0

t1=['A','E','F','H','I','K','L','M','N','T','V','W','X','Y','Z']

flag1=False
flag2=False

arr=list(input())

for i in arr:
	if(i in t1):
		flag1=True
	else:
		flag2=True
if(flag2 and flag1):
	print("NO")
else:
	print("YES")