A credit card number has 6 digits (between 1 to 9). The first two digits are 12 in that order, the third digit is bigger than 5, the forth is divisible by 3 and the fifth digit is 3 times the sixth. How many different credit card numbers exist?  Choose the most appropriate option:
A) 27
B) 72
C) 36
D) 112
E) 422
{1}{2}{greater than 5}{divisible by 3}{3x}{x}:   The third digit can take 4 values:6, 7, 8, or 9.   The fourth digit can take 3 values: 3, 6, or 9.   The fifth and sixth digits can take 3 values: 31, 62, or 93.   Total = 4*3*3= 
<gadget id="calculator">4*3*3</gadget>
<output>36</output>
36.   Answer: 36.
<result>C</result>
A credit card number has 6 digits (between 1 to 9). The first two digits are 12 in that order, the third digit is bigger than 5, the forth is divisible by 3 and the fifth digit is 3 times the sixth. How many different credit card numbers exist?