lst=[]
p = raw_input()
try:
    while(True):
        if p == '':
            break
        receipt,money = p.split(' ')
        lst.append([receipt,money])
        p=raw_input()
except:

    sum =0
    for item in lst:
        if len(item[0]) == 8:
            item[0] = '0'+item[0]
        a=item[0]
        if len(a)==9:
            s = int(a[0])*256+int(a[1])*128+int(a[2])*64+int(a[3])*32+int(a[4])*16+int(a[5])*8+int(a[6])*4+int(a[7])*2+int(a[8])*0
        #print a[-1],a[-2],a[-3]
        y = s%11
        #print y,a[8]
        if y == 10 and int(a[8])==0:
            sum = sum + int(item[1])
        elif y == int(a[8]):
            sum = sum+int(item[1])

    print str(sum)