Running Merge Conflict When using a tool such as git to merge two files, a conflict could be detected and added to the result of the merge.

A merge of these two files:

my file:

Common line of code 1
Common line of code 2
my lines
Common line of code 3
Common line of code 4


their file:

Common line of code 1
Common line of code 2
their lines
Common line of code 3
Common line of code 4


would result in:

Common line of code 1
Common line of code 2
&lt;&lt;&lt;&lt;&lt;&lt;&lt; Mine
my lines
=======
their lines
&gt;&gt;&gt;&gt;&gt;&gt;&gt; Theirs
Common line of code 3
Common line of code 4


See Conflict Marker Lines 

Resolving this conflict with Mine would create this file:

Common line of code 1
Common line of code 2
my lines
Common line of code 3
Common line of code 4


Resolving this conflict with Theirs would create this file:

Common line of code 1
Common line of code 2
their lines
Common line of code 3
Common line of code 4


The objective of this challenge is to write a source file that contains a conflict and still compiles/executes.

Write a source file which:


contains one valid, two-way, conflict marked by the proper patch conflict markers (&lt;&lt;&lt;&lt;&lt;&lt;&lt;, =======, &gt;&gt;&gt;&gt;&gt;&gt;&gt;) Mine and Theirs file descriptors after the markers are optional. 
compiles/executes without errors/warnings if the markers remain a part of the source
compiles/executes without errors/warnings if the conflict is resolved by using mine
compiles/executes without errors/warnings if the conflict is resolved by using theirs
outputs "Hello Conflict" when compiling/executing the conflicted file
outputs "Hello Mine" when compiling/executing the mine version
outputs "Hello Theirs" when compiling/executing the theirs version


The markers should be located in the source file in such a way that kdiff3 recognizes the conflict.

Standard loopholes are forbidden.

The shortest code wins.

Score is the length of the conflicted source
JavaScript (ES6), 102 94 93 90 bytes

console.log('Hello',(a=`
&lt;&lt;&lt;&lt;&lt;&lt;&lt;
Mine
=======
Theirs
&gt;&gt;&gt;&gt;&gt;&gt;&gt;
Conflict`.split`
`)[6]||a[1])


If the conflict has been resolved, then there is no sixth line, so it prints the now first line instead. Edit: Saved 3 bytes thanks to @nderscore.