[99-problems] move more for loop items into their own variable
[99-problems] move more for loop items into their own variable

shlomif/perl6-examples,Quinny/perl6-examples,perl6/perl6-examples,perl6/perl6-examples,shlomif/perl6-examples,stmuk/perl6-examples,stmuk/perl6-examples,shlomif/perl6-examples,stmuk/perl6-examples,shlomif/perl6-examples,shlomif/perl6-examples,stmuk/perl6-examples,Quinny/perl6-examples,perl6/perl6-examples,perl6/perl6-examples,Quinny/perl6-examples,stmuk/perl6-examples,perl6/perl6-examples,Quinny/perl6-examples,Quinny/perl6-examples