. . "often have difficulty" . . "in Japanese" . "Lia to ''Ria''" . . . . "Perception of English /r/ and /l/ by Japanese speakers" . "distinguishing \\\"l\\\" and \\\"r\\\"" . "alternatively transcribed" . "cannot tell the difference between ''r'' and ''l''" . "no distinction between \\\"l\\\" and \\\"r\\\"" . "Japanese" . "Perception of English /r/ and /l/ by Japanese speakers" . .