Question 1147162
Looking at all the arrangements, half of them
have C first and half of them have K first, the 
answer would be one half of all the permutations
( possible arrangements )
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Take one-half of this result because the S....S 
arrangements are the same after being switched
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So, the answer is:
{{{ (1/4)*( 5*4*3*2*1 ) = 30 }}}
Definitely get a 2nd opinion, too