Counting on base sixteen and four, as seen in the introductions to some early Bengali printed books

/o
//o
///o
|o
|/o
|//o
|///o
||o
||/o
||//o
||///o
|||o
|||/o
|||//o
|||///o
1J
1/o
1//o
1///o
1|o
1|/o
1|//o
1|///o
1||o
1||/o
1||//o
1||///o
1|||o
1|||/o
1|||//o
1|||///o
2J
2/o
2//o
2///o