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i,d=gets.split''
[*?a..?z].join[/#{i}/i]
($'+$`).chars{|c|$><<(i>?Z?c:c.upcase)+(d==?.?$/:' ')}

Success #stdin #stdout 0s 4716KB

stdin

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T.

stdout

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U
V
W
X
Y
Z
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S

https://ideone.com/v0ezQ

language:

Ruby (ruby 2.5.5)

created:

visibility:

public

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