Given a List of inequations with tuples(var1, sign, var2) and find out feasibility whether all the inquations are correct or not. return true or false. The signs are ">" or "<".
Ex: ["a",">","b"] , true
Ex: ["a",">","b"], ["b",">","c"] true
EX: ["a",">","b"], ["b",">","c"], ["c",">","a"] false.