CAF - substrings of random letters

DH: [name_u]Yuri[/name_u] Lyudmil
DW: [name_u]Calypso[/name_u] [name_f]Eirlys[/name_f]

DS: [name_u]Sparrow[/name_u] [name_m]Patrick[/name_m]
DS: [name_m]Cezar[/name_m] [name_m]Eliezer[/name_m]
DD: [name_f]Imogen[/name_f] [name_f]Angeline[/name_f]
DS: [name_u]August[/name_u] [name_m]Miguel[/name_m]
DS: [name_u]Beckett[/name_u] [name_u]Mackenzie[/name_u]