Javascript functions not working with Apex:commandbutton

I have two Javascript functions:

<script>

function confirmTransfer() {
  var tasks = "{!totalTasks}";
  var matches = "{!totalMatches}";
  var contacts = "{!totalContacts}";

  var transfer = confirm("Are you sure you wish to transfer: " + 
    tasks + " tasks, " + matches + " matches, and " + contacts " contacts?");

  if (transfer) return true;
  return false;
}  

function confirmCancel() {
  var isCancel = confirm("Are you sure you wish to cancel?");
  if (isCancel) return true;

 return false;
}
</script>

for some reason, just the confirmCancel function does what I want it do. The confirmTransfer button simply goes sstraight to the function call in the commandButton:

<apex:commandButton action="{!cancel}" value="Cancel" 
onclick="return confirmCancel()"immediate="true"/>    
<apex:commandButton action="{!step4}"  value="Transfer" 
onclick="return confirmTransfer()" immediate="true"/>

When I click Transfer, I see this in the console: transfercontacts:137 Uncaught ReferenceError: confirmTransfer is not defined

The syntax is the same, can anyone explain what this could be?

Thanks in advance!