The pen is shorter than the pencil by 2 centimeters, so it's 12 - 2 = <<12-2=10>>10 centimeters long.

That means the rubber is 10 - 3 = <<10-3=7>>7 centimeters long

So all accessories are 7 + 10 + 12 = <<7+10+12=29>>29 centimeters long altogether.

# Answer

29
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
A pen is longer than the rubber by 3 centimeters, and shorter than the pencil by 2 centimeters. Considering the pencil is 12 centimeters long, what is the total length of the rubber, the pen, and the pencil altogether?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
29
A pen is longer than the rubber by 3 centimeters, and shorter than the pencil by 2 centimeters. Considering the pencil is 12 centimeters long, what is the total length of the rubber, the pen, and the pencil altogether?
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