*** Answer #1 ***
    0.  [TWGC]  ===>  [    ]
    1.  [ W C]  <===  [T G ]
    2.  [TW C]  ===>  [  G ]
    3.  [   C]  <===  [TWG ]
    4.  [T GC]  ===>  [ W  ]
    5.  [  G ]  <===  [TW C]
    6.  [T G ]  ===>  [ W C]
    7.  [    ]  ====  [TWGC]

*** Answer #2 ***
    0.  [TWGC]  ===>  [    ]
    1.  [ W C]  <===  [T G ]
    2.  [TW C]  ===>  [  G ]
    3.  [ W  ]  <===  [T GC]
    4.  [TWG ]  ===>  [   C]
    5.  [  G ]  <===  [TW C]
    6.  [T G ]  ===>  [ W C]
    7.  [    ]  ====  [TWGC]