import matplotlib.pyplot as plt

x_coords = []
y_coords = []

try:
    filename = input("Input name: ")
    with open(f'{filename}', 'r') as file:
        lines = file.readlines()

    for line in lines[2:]:
        if line.strip():
            x, y = map(float, line.strip().split())
            x_coords.append(x)
            y_coords.append(y)

    plt.figure(figsize=(10, 6))
    plt.scatter(x_coords, y_coords, s=10, c='blue', alpha=0.5)
    plt.xlabel('X')
    plt.ylabel('Y')
    plt.grid(True)
    plt.axis('equal')
    plt.savefig(f"{filename[:-4]}.png")
    plt.show()
except FileNotFoundError:
    print(f"{filename} not found. ABORT!")