import matplotlib.pyplot as plt
file = open('second.txt', 'r')
x = {'USD': [], 'EURO': [], 'POUND': [], 'AUD': []}
y = {'USD': [], 'EURO': [], 'POUND': [], 'AUD': []}


for line in file:
    l = line.split()
    y[l[0]].append(float(l[2]))
    x[l[0]].append(len(y[l[0]]))
file.close()
plt.plot(x['USD'], y['USD'], x['EURO'], y['EURO'], x['POUND'], y['POUND'], x['AUD'], y['AUD'])
plt.show()