fix double item Solo

groupSoloItem.py

var5 = [["A","B","C"],["D"],["E","F","H"],["I"],["A","B","C"],["D","G"],["E","F","H"],["I"],["E","F","H"],["I"],["A","B","C"],["D"],["E","F"],["I"],["D"],["E","F","H"],["I"],["A","B","C"],["E","F","H"],["I"]]

iterable = iter(var5)
flag = True
out = []
while flag:
    try:
        sublst = next(iterable)
        if len(sublst) > 1:
            out.append(sublst) 
        else:
            out[-1].extend(sublst)
    except StopIteration:
        flag = False
        break             
                     
OUT = out        
print (OUT)