N,K=map(int,input().split()) import copy S=list(input()) """ S2 = copy.copy(S) s=[0]*N for i in range(0,N-K+1): for k, c in enumerate(reversed(list(S2[i:i+K]))): S2[i+k] = c s[i+k] += 1 # print('S2', S2) # print('s', s) """ shift = K-1 # print(shift) if N%2 == 1 and K%2 == 1: a="".join(S[shift:]) + "".join(reversed(S[:shift])) else: a="".join(S[shift:]) + "".join(S[:shift]) print(a) #print(list(a) == S2)