while True:
    try:
        a,b = map(int,input().split())
    except:
        exit()

    print(len(str(a+b))) while True:
    try:
        a,b = map(int,input().split())
    except:
        exit()

    print(len(str(a+b))) True try:
        a,b = map(int,input().split())
    except:
        exit()

     except:
        exit()

     exit() exit a,b = map(int,input().split()) a map(int,input().split()) map int input().split() ().split () input split b print(len(str(a+b))) print len(str(a+b)) len str(a+b) str a+b a b b = map(int,input().split()) map(int,input().split()) b a,b = map(int,input().split()) map(int,input().split()) a
while True:
    try:
        a,b = map(int,input().split())
    except:
        exit()

    print(len(str(a+b)))