Need some help with Redheart pattern

Working on Springtime baby dress LW2083....working with double ended crochet hook, doing dc loops, then working off stiches next row, no problem. Got to skirt row 3, it says: 4 dc loops in next 4 vertical bars at same time, dc loop in next verticall bar. Does anyone know how this is done? Any help would be appreciated!!
Thanks!!!!!!

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