💻 답안
s=input()
def solution(s):
count=0
alphabet=['A','B','C','D','E','F','G','H','I','J','K','L','M',
'N','O','P','Q','R','S','T','U','V','W','X','Y','Z']
answer=''
if s[0]=='1':
answer+='1'
for i in range(0,len(s)-1):
if s[i]==s[i+1]:
count+=1
else:
answer+=alphabet[count]
count=0
answer+=alphabet[count]
print(answer)
solution(s)
