Closer variants comparing an image of international keyboard output at:
https://www.msx.org/wiki/images/b/bc/
28E69583-3C7B-467E-8C01-
B44C9922EFC6.jpeg
from <https://www.msx.org/wiki/Philips_NMS_8245>.
'9' => 'ç',
')' => 'Δ',
'0' => 'δ',
'9' => 'ç',
')' => 'Δ',
'0' => 'δ',
- '-' => 'ε',
- '=' => 'Θ',
+ '-' => '∈',
+ '=' => 'ϴ',
'u' => 'é',
'i' => 'í',
'o' => 'ó',
'u' => 'é',
'i' => 'í',
'o' => 'ó',
'p' => 'ú',
'{' => 'Φ',
'[' => 'ø',
'p' => 'ú',
'{' => 'Φ',
'[' => 'ø',