How many 1's are there preceded by 2 but not followed by 7?
5 9 3 2 1 7 4 2 6 9 7 4 2 1 3 2 8 7 4 1 3 8 3 2 5 6 7 4 3 9 5 8 2 0 1 8 7 4 6 3	Choose the correct choice from the following choices.
A) 4  B) 5  C) 6  D) 1  E) 9
2 1 3   Only at these places 1 is preceded by 2 but not followed by 7   Answer: 1
<result>D</result>
How many 1's are there preceded by 2 but not followed by 7?
5 9 3 2 1 7 4 2 6 9 7 4 2 1 3 2 8 7 4 1 3 8 3 2 5 6 7 4 3 9 5 8 2 0 1 8 7 4 6 3