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$ perl -Mcharnames=:full -E 'say charnames::viacode($_) for (0x3b1, 0x +df, 0xa3)' GREEK SMALL LETTER ALPHA LATIN SMALL LETTER SHARP S POUND SIGN
$ perl -C -E 'say "\N{greek small letter alpha}"' Unknown charname 'greek small letter alpha' at -e line 1, within strin +g Execution of -e aborted due to compilation errors.