from math import *

## Exp W. Modes of long cyclinder (1D) ##
u = 343 #speed of sound
a = 0.2 #length width and height of cube
b = 0.2
c = 0.2
fqn = [] #frequencies and respective quantum numbers
f = [] # frequencies

for l in range (0,4):
    for m in range (0,4):
        for n in range (0,4):
            qn = [l,m,n]
            frequency = (u/2)*(sqrt((l/a)**2+(m/b)**2+(n/c)**2))
            if frequency in f: # check for duplicatesq
                continue
            else:
                f.append(frequency)
                fqn.append([frequency,qn])

for i in range(len(fqn)):
    print(sorted(fqn)[i])