There are four types of number machines: $$A$$, $$B$$, $$C$$, $$D$$.  Device A: Add $$3$$ to the input number;  Device B: Divide the input number by $$3$$;  Device C: Subtract $$3$$ from the input;  Device D: Multiply the input number by $$3$$.  These devices can be connected. If the device $$A$$ is followed by the device $$B$$, it is written as $$A-B$$. For example, input $$6$$, $$6 + 3 = 9, 9 \div3 = 3 $$. Thus the output would be $$3$$. If you input a number in the device $$B$$-$$A$$-$$D$$-$$C$$, and get $$60$$, the input number was ． 
选项为:A:$$54$$  B:$$55$$  C:$$45$$  D:$$32$$  请回答其中一个选项.