document.write( "Question 664403: helpppp! please and thanks; \r \n" );
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document.write( "Construct a tree diagram showing all four-letter arrangements, without repetition, from the set: \n" );
document.write( " {D, S, U, X} to answer the question below. \n" );
document.write( "How many arrangements have all consonants? \r \n" );
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document.write( "possible answers are 0, 10, and 15.\r \n" );
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document.write( "explain how you came up with the answer, thank you! \n" );
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