Round 123:
Prove the following by replacing each letter by a number:
........T.W.O
+.T.H.R.E..E
+.S.E.V.E..N
__________
T.W.E.L.V..E
Prove the following by replacing each letter by a number:
........T.W.O
+.T.H.R.E..E
+.S.E.V.E..N
__________
T.W.E.L.V..E
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