import sys
from collections import defaultdict

BX = 1765036
BY = 2000000

def mtn(P,Q):
    (x,y) = P
    (u,v) = Q
    return abs(u-x)+abs(v-y)

S = set()
B = set()
P = dict()
Q = defaultdict(list)

for l in sys.stdin.read().splitlines():
    (_,_,X,Y,_,_,_,_,A,J) = l.split(" ")
    x = int(X[2:-1])
    y = int(Y[2:-1])
    a = int(A[2:-1])
    b = int(J[2:])
    S.add((x,y))
    B.add((a,b))
    P[(x,y)] = (a,b)
    Q[(a,b)].append((x,y))

if len(S) < 20:
    BX = 2
    BY = 10
    

Xs = set()
for s in S:
    (x,y) = s
    sB = P[s] # nearest bc
    dB = mtn(s,sB)  # max range before first bc
    dy = abs(y-BY)  # to reach THE bc
    r = dB - dy
    if len(S) < 20:
        print(s, sB, (BX,BY), dB, dy, r) 
    if r > 0:
        for d in range(-r,r+1):
            nx = x+d
            if abs(nx-BX)>=0:
                Xs.add(nx)

print(len(Xs)-1)

if len(S) < 20:
    print(Xs)