Reorder days into src

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+--- Part Two ---
+
+Now, you just need to figure out how many orbital transfers you (YOU) need to take to get to Santa
+(SAN).
+
+You start at the object YOU are orbiting; your destination is the object SAN is orbiting. An orbital
+transfer lets you move from any object to an object orbiting or orbited by that object.
+
+For example, suppose you have the following map:
+
+COM)B
+B)C
+C)D
+D)E
+E)F
+B)G
+G)H
+D)I
+E)J
+J)K
+K)L
+K)YOU
+I)SAN
+
+Visually, the above map of orbits looks like this:
+
+                          YOU
+                         /
+        G - H       J - K - L
+       /           /
+COM - B - C - D - E - F
+               \
+                I - SAN
+
+In this example, YOU are in orbit around K, and SAN is in orbit around I. To move from K to I, a
+minimum of 4 orbital transfers are required:
+
+
+ - K to J
+
+ - J to E
+
+ - E to D
+
+ - D to I
+
+
+Afterward, the map of orbits looks like this:
+
+        G - H       J - K - L
+       /           /
+COM - B - C - D - E - F
+               \
+                I - SAN
+                 \
+                  YOU
+
+What is the minimum number of orbital transfers required to move from the object YOU are orbiting to
+the object SAN is orbiting? (Between the objects they are orbiting - not between YOU and SAN.)
+
+