
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 are 23 symbols drawn on a board: some plus signs and some minus signs. If you select any 10 symbols from them, there will be at least one plus sign among them. If you select any 15 symbols from them, there will be at least one minus sign among them. How many plus signs are there in total?

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