East must not pass ! 
East can count 5½ HCP plus 1 Length Point for the 5-card ♥ suit : 6½ points in total.  East can therefore respond with 1♥.  West replies with 1♠.  What should East  do now  ?
  Comment Experts agree that a 5-card suit usually  provides Declarer with one extra trick. Counting LPs is therefore essential when assessing your hand for your first bid. 
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