{a, b, 1, 1, 1, 1, #}
{a, a, a, a, k, 1, #}
{aa,ba,1a,1a,1k,12,#}

n=3

{a, b, 1, 1, #}
{a, a, k, 1, #}
{aa,ba,1k,12,#}

n=1