Draw a right triangle with asterisks of size n. For example, for n=5

    '*    '
    '**   '
    '***  '
    '**** '
    '*****'

the empty places should be space.

There can be four types: bottom left (bl), bottom right (br), top left (tr) , top right (tr). The above example is 'bl' type.

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Chris Cleveland George Berken Athi Alexander Ross

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