Please add this character used in Old Polish: $A7C0 and $A7C1 (highlighted in red in the below image). It is obtained by the letter o combined with the tails at the top and bottom.
This image containing the modern and older Polish alphabets may be helpful. Note that the problem characters have been highlighted in blue:
Notes: 1) Digraphs are shown in gray.
Please add these characters also used in Old Polish:
- $0304 (combining macron)
- $0308 (combining umlaut)
- $030D (combining overline)
- $1E58, $1E59 (r overdot)
- $1E82, $1E83 (w acute)
- $1E84, $1E85 (w umlaut)
- $1E8A, $1E8B (x overdot)
- $1E8C, $1E8D (x umlaut)
- $1EA0, $1EA1 (a underdot)
- $2C7F, $0240 (z swash tail)