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## lastword
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### Instructions
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Write a program that takes a string and displays its last word, followed by a
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newline.
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A word is a section of string delimited by spaces/tabs or by the start/end of
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the string.
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If the number of parameters is not 1, or if there are no words, simply display
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a newline.
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Example :
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```console
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student@ubuntu:~/student/lastword$ go build
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student@ubuntu:~/student/lastword$ ./lastword "FOR PONY" | cat -e
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PONY$
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student@ubuntu:~/student/lastword$ ./lastword "this ... is sparta, then again, maybe not" | cat -e
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not$
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student@ubuntu:~/student/lastword$ ./lastword " " | cat -e
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$
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student@ubuntu:~/student/lastword$ ./lastword "a" "b" | cat -e
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$
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student@ubuntu:~/student/lastword$ ./lastword " lorem,ipsum " | cat -e
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lorem,ipsum$
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student@ubuntu:~/student/lastword$
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```
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