Tests for tandem.

sdr> /program = Program.C1
C1
sdr> heads lead right
| 4B>  3G<  1B>  2G<
| 
| 4G>  3B<  1G>  2B<
sdr> as couples touch 1/4
| 3B^  3G^  4Gv  4Bv  2B^  2G^  1Gv  1Bv
sdr> fan the top ; half tag
| 3G^  3Bv  2G^  2Bv
| 
| 4B^  4Gv  1B^  1Gv
sdr> tandem swing thru
| 4G^  2Bv  3G^  1Bv
| 
| 3B^  1Gv  4B^  2Gv
sdr> tandem fan the top
| 3B>  4G>
| 
| 1G<  2B<
| 
| 4B>  3G>
| 
| 2G<  1B<
sdr> tag the line
| 4B^  3G^
| 
| 2G^  1B^
| 
| 3Bv  4Gv
| 
| 1Gv  2Bv
sdr> tandem trade
| 1Bv  2Gv
| 
| 3Gv  4Bv
| 
| 2B^  1G^
| 
| 4G^  3B^
sdr> double pass thru
| 2B^  1G^
| 
| 4G^  3B^
| 
| 1Bv  2Gv
| 
| 3Gv  4Bv
sdr> track two
| 4B^  3Bv  3G^  4Gv
| 
| 2G^  1Gv  1B^  2Bv
sdr> half tag
| 4B>  3B>
| 
| 3G<  4G<
| 
| 2G>  1G>
| 
| 1B<  2B<
sdr> boys tandem trade
| 2B>  1B>
| 
| 3G<  4G<
| 
| 2G>  1G>
| 
| 3B<  4B<
sdr> swing thru three times
| 2G>  1G>
| 
| 2B<  1B<
| 
| 3B>  4B>
| 
| 3G<  4G<
sdr> /resolveStep
Right and Left Grand
sdr> /exit