n = int(input(""))
numlist = []
nolist = []
yeslist = []
    
clist = list(range(10))

for i in range(n):
    input_line = input("").split(" ")

    temp = []
    for i in range(4):
        temp.append(int(input_line[i]))
    #print("temp", temp)     # temp = [a, b, c, d]
    
    if input_line[4] == "NO":
        nolist.append(temp)
    else:
        yeslist.append(temp)
    #print("nolist", nolist, "yeslist", yeslist)


if nolist != []:
    for i in range(len(nolist)):
        for j in range(4):
            if nolist[i][j] in clist:
                clist[clist.index(nolist[i][j])] = 0

if yeslist != []:
    for i in range(len(yeslist)):
        for j in range(10):
            if j not in yeslist[i]:
                clist[j] = 0
                
#print(clist)
print(sum(clist))