字符串模拟

n,q=map(int,input().split())
s='?'+input()
for _ in range(0,q):
    l,r=map(int,input().split())
    s1=s[:l]
    s2=s[l:r+1]
    s3=s[r+1:]
    tmp=[i+i for i in s2]
    s4=''.join(tmp)
    s=s1+s4+s3
print(s[1:])