from string import ascii_uppercase

abc = ('a','1','2','3','b','c')
a = abc[0]
b = abc[1]
c = abc[2]
d = abc[3]
e = abc[4]
f = abc[5]

res1 = a.upper() in ascii_uppercase
res2 = b.isdigit()
res3 = c.isdigit()
res4 = d.isdigit()
res5 = e.upper() in ascii_uppercase
res6 = f.upper() in ascii_uppercase
if res1 == True and res2 == True and res3 == True and res4 == True and res5 == True and res6 == True:
    print('YES')
else:
    print('No')