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EC Tree
1.8.6.1 created 1961, deleted 1976
1.12.99.1 created 1989, deleted 2002
1.12.99.2 created 1992, deleted 2002
1.12.99.3 created 1999, deleted 2002
1.12.99.4 created 1999, deleted 2002
1.12.99.5 created 1999, deleted 2001