As it happens neither the \G nor the \s* are required in this case.
my %States = q{
AK Alaska LA Louisiana OH Ohio
AL Alabama MA Massachusetts OK Oklahoma
AR Arkansas MD Maryland OR Oregon
AZ Arizona ME Maine PA Pennsylvania
CA California MI Michigan RI Rhode Island
CO Colorado MN Minnesota SC South Carolina
CT Connecticut MO Missouri SD South Dakota
DE Delaware MS Mississippi TN Tennessee
FL Florida MT Montana TX Texas
GA Georgia NC North Carolina UT Utah
HI Hawaii ND North Dakota VA Virginia
IA Iowa NE Nebraska VT Vermont
ID Idaho NH New Hampshire WA Washington
IL Illinois NJ New Jersey WI Wisconsin
IN Indiana NM New Mexico WV West Virginia
KS Kansas NV Nevada WY Wyoming
KY Kentucky NY New York US United States Of Am
+erica
} =~ /(\w\w)\s+(\w+(?:\s\w+)*)/g;
print "$_ => $States{$_}\n" for keys %States;
cheers
tachyon
s&&rsenoyhcatreve&&&s&n.+t&"$'$`$\"$\&"&ee&&y&srve&&d&&print
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