file1.txt

a a a a
a d c b
a a a a

file2.txt

a a a a
a c c d
c c c c
a a c a

file3.txt

z z z
y y y
x x x
w w w
v v v

file4.txt

k k k k k
k k k l k

file1.txt

abbye:benedicta
rey:rey
kevina:benedicta
glenine:kathye
kathye:benedicta

file2.txt

claribel:elfrida
claribel:valery
elfrida:mala
valery:christiane
christiane:caprice

file3.txt

neila:odele
kelsi:kelsi
delphinia:delphinia
danyelle:danyelle
odele:lolly