You can receive or send out Morse codes in flashlight or smoke signal form. Note the dots and dashes as you receive them, rather than attempting to decode them simultaneously. Write down every symbol; then decode all of the symbols later.
A • – |
J • – – – |
S • • • |
0 – – – – – |
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Examples: SOS • • • – – – • • • GOOGLE – – • – – – – – – – – • • – • • • |