1( )A BC DC
2( )A B C D C
32( ) A B C D B
4( ) A B C D D
5( )A BC D C
6( )A BC D A
1( )ABCDE ABD
2( )A B CDE ABCD
3( )ABCDE ABC
420( )A B()C D E ABCE
5( )A BCDEABDE
6( )A BCDEACDE
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