how to get the lower alphabet list in sub list

This below code for lower alphabet. But I want to make that code in list like

1. hello

i. Hi

a) bye

See I want to display that lowercase a in the list 3 with space. But I can't able to do that.

Here what i Tried

public void methodalpha()

{

object missing = System.Reflection.Missing.Value;

Application app = Globals.ThisAddIn.Application;

app.Visible = true;

// whatever is selected will be turned into a numbered list.

object n = 1;

ListTemplate template =

app.ListGalleries[WdListGalleryType.wdOutlineNumberGallery].ListTemplates.get_Item(ref n);

Microsoft.Office.Interop.Word.ListLevel level = template.ListLevels[1];

level.NumberFormat = "%1.";

level.TrailingCharacter = WdTrailingCharacter.wdTrailingTab;

level.NumberStyle = WdListNumberStyle.wdListNumberStyleLowercaseLetter;

level.NumberPosition = app.InchesToPoints(0.25f);

level.Alignment = WdListLevelAlignment.wdListLevelAlignLeft;

level.TextPosition = app.InchesToPoints(0.5f);

level.TabPosition = (float)WdConstants.wdUndefined;

level.ResetOnHigher = 0;

level.StartAt = 1;

level.Font.Bold = (int)WdConstants.wdUndefined;

level.Font.Italic = (int)WdConstants.wdUndefined;

level.Font.StrikeThrough = (int)WdConstants.wdUndefined;

level.Font.Subscript = (int)WdConstants.wdUndefined;

level.Font.Superscript = (int)WdConstants.wdUndefined;

level.Font.Shadow = (int)WdConstants.wdUndefined;

level.Font.Outline = (int)WdConstants.wdUndefined;

level.Font.Emboss = (int)WdConstants.wdUndefined;

level.Font.Engrave = (int)WdConstants.wdUndefined;

level.Font.AllCaps = (int)WdConstants.wdUndefined;

level.Font.Hidden = (int)WdConstants.wdUndefined;

level.Font.Underline = WdUnderline.wdUnderlineNone;

level.Font.Color = WdColor.wdColorAutomatic;

level.Font.Size = (int)WdConstants.wdUndefined;

level.Font.Animation = WdAnimation.wdAnimationNone;

level.Font.DoubleStrikeThrough = (int)WdConstants.wdUndefined;

level.LinkedStyle = "";

template.Name = "";

object bContinuePrevList = false;

object applyTo = WdListApplyTo.wdListApplyToSelection;

object defBehavior = WdDefaultListBehavior.wdWord10ListBehavior;

app.Selection.Range.ListFormat.ApplyListTemplateWithLevel(

template, ref bContinuePrevList,

ref applyTo, ref defBehavior, ref missing);

}

Please help me