ts         = !ws tests !ws => ts
tests      = test */ ws
ws         = w*
test       = ^"testcase" "{" input output +/ ws   Grammar "}" /ws
           | ^"testcase" "{" input                Grammar "}" /ws
           | ^"tibcase"  "{" input output +/ ws   Grammar "}" /ws
           | ^"tibcase"  "{" input                Grammar "}" /ws
output     = ^"output" Quoted ";" /ws
input      = "input"  Quoted ";" /ws