'''
@Author: your name
@Date: 2020-07-28 11:34:24
@LastEditTime: 2020-07-28 12:04:47
@LastEditors: Please set LastEditors
@Description: In User Settings Edit
@FilePath: \vscode_py\day22.py
'''

# Question 90
# 统计字符串中的字母数量
def Q90():
    s=input()
    dic={}
    for i in s:
        dic[i]=dic.get(i,0)+1     # 如果字典中有这个值，那么数量+1,否则返回默认值0
    print("\n".join(['%s %s' % (k, v) for k, v in dic.items()]))

# Question 91
# 倒序排列字符串
def Q91():
    s=input()
    # ans=s[::-1]
    # print(ans)

    ans=''.join(reversed(s))
    print(ans)

# Question 92
# 打印偶数索引的值
def Q92():
    s=input()
    ans=[s[i] for i in range(len(s)) if i%2==0]
    print(''.join(ans))

# Question 93
# 打印所有的排列组合
# Please write a program which prints all permutations of [1,2,3]
def Q93():
    import itertools
    # print(list(itertools.permutations([1,2,3])))

# Question 94
# 鸡兔同笼
def Q94():
    head=35
    leg=94
    for i in range(head+1):
        if i*2+(head-i)*4==leg:
            return i,head-i
    return "No solutions!"

    
    



if __name__ == "__main__":
    # Q90()

    # Q91()

    # Q92()

    # Q93()

    ans=Q94()
    print(ans)