its a Playfair cipher solver java program for example use this:
plain text: mynameiskokoandiliveinalexandilovefootbalxlx
Encrypted text: vasdegqnlflfdsncnlmwlongwgdsncnhmwottzmbrgrg
OR
plain text: mynameismostafaxandiliveinalexloveplayfootbalxlxfekr
Encrypted text: utorflthostadmdorokceqguqgrmfgmngugnztmxsasdfnfnelrz
For more information: https://learncryptography.com/classical-encryption/playfair-cipher https://en.wikipedia.org/wiki/Playfair_cipher