[mflatt@localhost cs4400]$ /bin/echo hello
hello
[mflatt@localhost cs4400]$ /bin/echo hello dolly
hello dolly
[mflatt@localhost cs4400]$ /bin/echo hello dolly!
hello dolly!
[mflatt@localhost cs4400]$ /bin/echo "hello  dolly!"
bash: !": event not found
[mflatt@localhost cs4400]$ /bin/echo "hello  dolly"
hello  dolly
[mflatt@localhost cs4400]$ /bin/echo "hello  dolly'!'"
bash: !: event not found
[mflatt@localhost cs4400]$ /bin/echo '"hello  dolly"'
"hello  dolly"
[mflatt@localhost cs4400]$ /bin/echo '"hello  dolly!"'
"hello  dolly!"
[mflatt@localhost cs4400]$ /bin/echo 'hello  dolly!'
hello  dolly!
[mflatt@localhost cs4400]$ /bin/echo "hello  dolly!"
bash: !": event not found
[mflatt@localhost cs4400]$ /bin/echo "hello  dolly\!"
hello  dolly\!
[mflatt@localhost cs4400]$ /bin/echo "hello  dolly"!
hello  dolly!
[mflatt@localhost cs4400]$ /bin/echo 'say hello  dolly friend'
say hello  dolly friend
[mflatt@localhost cs4400]$ /bin/echo 'say "hello"  dolly friend'
say "hello"  dolly friend
[mflatt@localhost cs4400]$ /bin/echo 'say "hello"  dolly's friend'
> '
say "hello"  dollys friend

[mflatt@localhost cs4400]$ /bin/echo 'say "hello"  dolly"'"s friend'
> '
> ^Dbash: unexpected EOF while looking for matching `"'
bash: syntax error: unexpected end of file
[mflatt@localhost cs4400]$ /bin/echo 'say "hello"'" dolly's friend"
say "hello" dolly's friend
[mflatt@localhost cs4400]$ /bin/echo 'say "hello"' " dolly's friend"
say "hello"  dolly's friend
[mflatt@localhost cs4400]$ /bin/echo 'say "hello"'"dolly's friend"
say "hello"dolly's friend