#!/usr/bin/env python3

def dist(p1, p2): return (p2[0] - p1[0]) * (p2[0] - p1[0]) + (p2[1] - p1[1]) * (p2[1] - p1[1])


def is_parallel(p1, p2, p3, p4): return (p1[0] - p2[0]) * (p4[1] - p3[1]) == (p4[0] - p3[0]) * (p1[1] - p2[1])


points = [tuple(map(int, input().split())) for _ in range(4)]
sides = [dist(p1, p2) for p1, p2 in zip(points, points[1:] + points[:1])]
equal_diagonals = dist(points[0], points[2]) == dist(points[1], points[3])
if all(s == sides[0] for s in sides):
    exit(print("square" if equal_diagonals else "rhombus"))
if sides[0] == sides[2] and sides[1] == sides[3]:
    exit(print("rectangle" if equal_diagonals else "parallelogram"))
if sides[0] == sides[1] and sides[2] == sides[3] or sides[1] == sides[2] and sides[3] == sides[0]:
    exit(print("kite"))
print("trapezium" if is_parallel(*points) or is_parallel(*(points[1:] + points[:1])) else "none")