
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
There is a row that consists of digits from  $ 0$  to  $ 9$  and Ukrainian letters (there are  $ 33$  of them) with following properties: there aren’t two distinct digits or letters  $ a_i$ ,  $ a_j$  such that  $ a_i > a_j$  and  $ i < j$  (if  $ a_i$ ,  $ a_j$  are letters  $ a_i > a_j$  means that  $ a_i$  has greater then  $ a_j$  position in alphabet) and there aren’t two equal consecutive symbols or two equal symbols having exactly one symbol between them. Find the greatest possible number of symbols in such row.

Present the answer in LaTex format: \boxed{Your answer}
user