You will make a travel through the edges of two tetrahedrons (ABCD, and CDEF) joined as shown in the figure.
-You will start at A, and finish at F.
-You can visit the vertices more than once except the finishing vertex F.
-You cannot pass through the edges more than once.
In how many ways can this travel be done?
Note: Two travels having same edges in different order will be considered as different.
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