Financial math

Ten annual deposits of 1000 each are made to Account A, starting on January 1, 1986. Annual deposits of 500 each are made to Account B indefinitely, also starting on January 1,1986 . Interest on both accounts is at rate i=.05, with interest credited every December 31 . On what date will the balance for Account B first exceed the balance for Account A? Assume that the only transactions to the accounts are deposits and interest credited every December 31