import sys
input = sys.stdin.readline

N,K=map(int,input().split())
S=input().strip()

flag=1

now=0

for s in S:
    if s=="(":
        now+=1
    else:
        now-=1

    if now<0:
        flag=0

if now!=0 or flag==0:
    print("No")
    exit()


ANS=[]
for s in S:
    if ANS and ANS[-1]==")" and s=="(":
        ANS.append("+")
    if ANS and ANS[-1]=="(" and s==")":
        ANS.append("1+1")
    if ANS and ANS[-1]=="(" and s=="(":
        ANS.append("1+")

    ANS.append(s)

A="".join(ANS)
c=A.count("1")

if c>K:
    print("No")
else:
    A+="+1"*(K-c)

    print(A)