A valley can be from a toe of a fill.Logical formLearned from6 sentences. A fill can be completed.Logical formLearned from6 sentences. A surface of a fill can be at an elevation.Logical formLearned from6 sentences. An area of drainage may occur above a fill.Logical formLearned from6 sentences. A fill may drain into a (fill area).Logical formLearned from6 sentences. A crest may pertain-to a fill.Logical formLearned from6 sentences. A fill can be linear.Logical formLearned from6 sentences. A (fill prefix) may be chosen.Logical formLearned from6 sentences. A (density fill) can be controlled.Logical formLearned from6 sentences. Fills can be in blanks.Logical formLearned from6 sentences. A fill can be flat.Logical formLearned from6 sentences. A fill can be radial.Logical formLearned from6 sentences. An algorithm may pertain-to fill.Logical formLearned from6 sentences. Spaces may be used as a (fill prefix).Logical formLearned from6 sentences. A part may pertain-to a fill.Logical formLearned from6 sentences.