Problems
At least two equal digits
At least two equal digits
Five-digit number is given. Determine whether the number contains at least two identical digits.
\InputFile
One five-digit number.
\OutputFile
Print "\textbf{YES}" if the number has at least two identical digits. Print "\textbf{NO}" otherwise.
Input example #1
12345
Output example #1
NO
Input example #2
63456
Output example #2
YES