Talk:ABC problem: Difference between revisions
→Not a set of blocks
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: Why not change one of the toy blocks to a '''(S F)'''? That is the case for '''(B O)'''. -- [[User:Gerard Schildberger|Gerard Schildberger]] ([[User talk:Gerard Schildberger|talk]]) 01:42, 9 January 2014 (UTC)
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