Решение:

    with open('9.txt', 'r') as file: 
        f = file.read().splitlines()
    
    c = 0
    for i in f:
        line = sorted(map(int, i.split('\t')))
        mx = line[-1]
        mn = line[0]
        if (mx + mn) ** 2 > line[1] ** 2 + line[2] ** 2  + line[3] ** 2:
            c += 1
    print(c)
    

Ответ: 2585