print_apply(sqrt,<9,16,25,121>),:
print_apply(len,
       <`dog',`cat',`mouse'>),:
print_apply(type,<1+1,`Hello',type>),:
print_map(<10,5,3>,greater,<6,5,4>),:
print_map(<`dog',`cat',`mouse'>,
          instr,<`o',`z',`u'>),:
print_map(<1,2,3>,join,<4,5,6>),:
print_map(<1,2,3>,join,<4,5,6>+0),:
print_reduce(join,<a,b,c,d,e>),:
print_reduce(join,<1,2,3+0,4,5>),:
print_reduce(
       join,<5,*,4,*,3,*,2,*,1>),:
print_reduce(greater,<4,3,0,-2>)