Bareword found where operator expected at -e line 3, near "] String0"
        (Missing operator before String0?)
Bareword found where operator expected at -e line 4, near "] String1"
        (Missing operator before String1?)
Bareword found where operator expected at -e line 5, near "] String2"
        (Missing operator before String2?)
Bareword found where operator expected at -e line 6, near "] String3"
        (Missing operator before String3?)
Bareword found where operator expected at -e line 7, near "] String4"
        (Missing operator before String4?)
Bareword found where operator expected at -e line 8, near "] String5"
        (Missing operator before String5?)
Bareword found where operator expected at -e line 9, near "] String6"
        (Missing operator before String6?)
Bareword found where operator expected at -e line 10, near "] String7"
        (Missing operator before String7?)
syntax error at -e line 3, near "] String0"
Execution of -e aborted due to compilation errors.

##</code><code>##

my @matches = $initialStr =~ /\d+:\d+:\d+/g;

##</code><code>##

my @matches = $initialStr =~ /\[ .*? \] \s* ( \[ .*? \] .* )/gx;