two up those I would abbreviate to have them if there were four of them or five them it doesn't matter how many there are you abbreviate the entire group with them with double Collins 640-864 you get only do this double cola abbreviation one-time in 640-864 this particular address so if this had a group a two on one side the dress in a group with you on the other side the dress just pick one of them to abbreviate you would not abbreviate bow to them a double columns because then you would know how many was in group still
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