The digits 1,1,2,2,3, and 3 are arranged to form an odd six digit integer. The 1's are separated by one digit, the 2's by two digits, and the 3's by three digits. What are the last three digits of this integer?
Answer Choices
A. 3\:1\:2
B. 1\:2\:3
C. 1\:3\:1
D. 1\:2\:1
E. 2\:1\:3