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Sound files for problem 3
tele_1.wav,
tele_2.wav,
tele_3.wav,
tele_4.wav,
tele_5.wav,
tele_6.wav,
tele_7.wav,
tele_8.wav,
tele_9.wav,
all_tones.wav,
dialtone.wav,
ring.wav,
Numbers