alpha
         beta           gamma
    var1 var2 var3 var1 var2 var3
1     21   50    5   22   48    6
2     27   50    5   24   48    6
3     26   50    5   28   48    6
4     25   50    5   28   48    6

var1 var2 var3  var4 var5
1     21   50    5  alpha beta
2     27   50    5  alpha beta
3     26   50    5  alpha beta
4     25   50    5  alpha beta
5     22   48    6  alpha gamma
6     24   48    6  alpha gamma
7     28   48    6  alpha gamma
8     28   48    6  alpha gamma

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