
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
Given the program:  
INPUT x  
IF 9<x AND x<100 THEN  
a=x＼10  
b=x MOD 10  
x=10*b+a  
PRINT x  
END IF  
END  
(Note: "＼" represents the integer part of the quotient when x is divided by 10, "MOD" is the remainder when x is divided by 10)  
If the input value of x is 51, then the result of the operation is.

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