1M - 3♣ - 3♦ -

3M    =    7-9 HC, balanced

3oM  =    7-9 HC, singleton    ➤    3NT = asking    ➤    4♣/♦/♥ = ♣/♦/oM singleton

3NT  =    10-12 HC, 4+ CT

4M    =    10-12 HC, 3- CT

4m/(♥) =    10-12, 54+22, tricks in side suit

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