appending a string to another string
<p>I have 2 lists :</p>

<p>list1 contains "T" "F" "T" "T"</p>

<p>list2 contains "a" "b" "c" "d"</p>

<p>I want to create a third list such that I append element1 in list1 to element1 in list2.</p>

<p>So list3 would be the following: "Ta" "Fb" "Tc" "Td"</p>

<p>How can i do that?</p>
