题解 | #字符串旋转#

s=input().strip()

p=''
c=1
for i in range(len(s)):
    if len(s)>=2:
        if i+1<len(s) and s[i]==s[i+1]:
            c+=1
        else:
            p+=str(c)
            p+=s[i]
            c=1
    else:
        p+=str(c)
        p+=s
print(p)