+ import std.math;
  import std.typecons;
- import std.math;
  /*
  Given a non-empty array of integers, return the sum of all of the odd elements that are in even positions.
-     
- 
-     Examples
? ----

+ Examples
-     >>> solution([5L, 8L, 7L, 1L])
? ----

+ >>> solution([5L, 8L, 7L, 1L])
-     12L
+ 12L
-     >>> solution([3L, 3L, 3L, 3L, 3L])
? ----

+ >>> solution([3L, 3L, 3L, 3L, 3L])
-     9L
+ 9L
-     >>> solution([30L, 13L, 24L, 321L])
? ----

+ >>> solution([30L, 13L, 24L, 321L])
+ 0L
-     0L
-     
  */
  long solution(long[] lst)